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Day in History, Oct. 15, 1945: Alberta miners end two-week strike over meat rationing
Thursday, October 15, 2015
Strikes, or what the miners called “holidays,” started in various parts of the province after miners complained they were not receiving sufficient meat under the dominion (Canadian) government’s rationing system. read more »
Issaquah hiking tour reveals dangers, history of coal mining
Thursday, October 08, 2015
The Issaquah History Museum in Washington State hosts a hiking tour up to old mines in the area that reveals the rich history and hazards of coal mining. The guided tour explores the Grand Ridge Mines on an Issaquah mountain riddled with dozens of old mine shaft entrances. read more »
TIMELINE: Birth and development of the diamond mining industry
Friday, June 12, 2015
While the term "diamond" comes from the Greek word "Adamas", meaning "unconquerable", the earliest gems were found in India, in 4th century BC. From then until now, the industry has growth exponentially and Design by Sevan has developed this great timeline with the main highlights read more »
Comstock History Center Museum opens mining photo exhibit
Thursday, April 30, 2015
The Comstock History Center Museum is presenting a new historic photo exhibit, “Vanishing Icons: A Look Back at Comstock Mines and Mills.” read more »
West Virginia Mine Wars Museum aims to tell overlooked coalfields history
Tuesday, April 28, 2015
Local volunteers and historians are opening a museum in Matewan dedicated to telling the untold and often-overlooked stories of coal miners’ long and bloody fight for labor rights. read more »
Peter Byrne Receives the RF Legget Medal
Monday, February 09, 2015
This week we to the dinner given in honor of Dr. Peter Byrne and his receiving the RF Legget Medal. The Medal is one of the highest awards a Canadian soils engineer can receive and Peter Byrne is a worthy recipient. read more »
Mass grave with hundreds of skeletons found in Bolivian mining town
Monday, July 28, 2014
Construction workers in the southern city of Potosi, Bolivia, have uncovered the remains of hundreds of miners believed to be from the Spanish colonial era. read more »
Mining history display OK'd for San Andreas
Thursday, February 13, 2014
A mining history display complete with historic ore carts, a mine hoist and headworks and various ore-crushing machinery will be built on eight-tenths of an acre on the Calaveras County Government Center in San Andreas. read more »
Mining in the Scandinavian Peninsula
Tuesday, February 11, 2014
To this day, Sweden, Finland and Norway remain among Europe’s elite mining nations. Indeed as of December 2009, Sweden was noted to have had a total of 879 active deposits, while Finland and Norway possessed 343 and 160 deposits respectively. read more »
The book covers 150 years of commercial mining activity in South Africa
Tuesday, February 04, 2014
To hear state Rep. James McLaughlin explain it as he walks Chase Street, history looms ominously underground here. At any moment, it seems, a 19th century coal mine shaft could cave in beneath his feet. read more »
Historian publishes a history of SA mining
Friday, January 24, 2014
South African mining historian Jade Davenport has written a book called Digging Deep – A History of Mining in South Africa. The book covers 150 years of commercial mining activity in South Africa. read more »
One of region's most definitive mining archives goes online
Monday, December 16, 2013
The whole world can dig into the region’s history after a North-East university unveiled one of the most definitive mining archives online. read more »
Prinsloo of Prinsloosdorp
Thursday, May 30, 2013
More than a hundred years have passed; much has changed; and yet so much about mining is the same. This thought is prompted by reading Prinsloo of Prinsloosdorp by Douglas Blackburn. First published in1898, reprinted in 1908; and now available in a printing from 1989. read more »
Hydraulic Mining: Not Your Everyday Pressure Washer
Thursday, April 18, 2013
Even though it has been around for quite some time, hydraulic mining is still being used to move sediment or dislodge materials. The origins of this technique have been dated as far back as Ancient Rome. read more »
History Lessons: The Pickaxe
Monday, April 15, 2013
Probably the most iconic mining tool, the pickaxe, has been used as far back as the prehistoric times. Although not always used for mining as some people have perceived it to be, the “pick” was also used as an agricultural tool and even a weapon in medieval times. read more »
History of Nevada mining
Thursday, September 06, 2012
The Comstock Lode was discovered in 1857 when two prospectors sank a small pit to collect water for their rocker and accidentally hit the lode. read more »
New Temporary Exhibit at Britannia Mine Museum
Monday, April 16, 2012
There is a new exhibit that opened today at the Britannia Mine Museum, located just north of Vancouver, Canada. The exhibit which runs until June 15 showcases amazing close-up images of minerals. read more »
Roy L. Soderberg and his Contribution to Mine Tailings
Thursday, April 12, 2012
Abstracts for the Tailings and Mine Waste Conference 2012 to be held in Keystone, Colorado October 14-17, 2012 are due the end of this week. Here is one idea that should be written up, but probably won’t. read more »
The History of Tailings Filter-Pressing from SME’s One Mine
Monday, April 09, 2012
You will need to access the SME One Mine Library to get the earliest papers on filter pressing of tailings. Here are interesting points from some read more »
The Past & Future of Tailings Disposal
Tuesday, March 13, 2012
Mike Gowan of Golder Associates in Australia has enabled me to post at this link a PowerPoint presentation of a talk he gave earlier this month in South Africa.  read more »
Bomvu Ridge and Groundwater Modelling in Mining
Friday, March 09, 2012
This is a story of a time before computers; before groundwater conceptual models, numerical models, baseline models, and predictive models; before groundwater model calibration, verification, or sensitivity analysis. read more »
Mine Safety: Historic Admissions From Greens Creek
Friday, February 03, 2012
In the past, we have all done silly things at mines that constitute safety violations. Here I record a drilling program I worked on in 1981 and 1982 at the then-proposed Greens Creek mine in Alaska. read more »
Oil Sands and Other Tailings Trafficability
Tuesday, January 31, 2012
I came across a short hand-written piece that I penned in 1982. This piece is interesting in light of the muddle made by the Alberta ERCB in demanding an oil sand tailings strength of 10 kPa read more »
Shedding Positive Light on Mining in Brazil
Monday, January 23, 2012
Seldom on a Sunday is there a good book about mining to read. Today I hit the jackpot. I read Understanding Mining Around the Quadrilatero Ferrifero. read more »
Historical overview of traditional and modern gold mining in Ghana
Wednesday, December 07, 2011
Good paper on pre-colonial methods of mining in the gold rich west African country of Ghana. read more »
The Exploration Geologist - Yesterday, Today and Tomorrow
Tuesday, December 06, 2011
... he learned a lot about the use of small boats to map up rivers, and how to work with horses and elephants. Also the importance of the regular supply of opium from China, to avoid the miners going on strike. Not a lot of science perhaps, but useful knowledge and experience. read more »
British Columbia Historical Newspapers Online
Tuesday, November 29, 2011
For the first time ALL these historical newspapers online documenting the succesive gold & silver rushes that spread like wildfire through the rugged mountains and deep valleys of the new Canadian province. read more »
If it can't be grown, it must be mined - Arizona Mining Association
Tuesday, November 01, 2011
A beautiful history of mining in Arizona - from Apaches to the lonely prospector and his burro and to modern copper mines. read more »
History of American Railroads and Mapping
Wednesday, October 19, 2011
Surveying and mapping activities flourished in the United States as people began moving inland over the inadequately mapped continent. The settlement of the frontier, the development of agriculture, and the exploitation of natural resources generated a demand for new ways to move people and goods from one place to another. read more »
The Gold Mines Built Yellowknife
Tuesday, October 11, 2011
Yellowknife was founded as a gold mining camp in 1937 and has risen to become a great capital city, looking to the bright future and reflecting on its glorious past. read more »
Niven William - Mineralogist and archeologist
Monday, September 12, 2011
William Niven, mineralogist and archeologist, son of William and Sarah (Brown) Niven, was born in Bellshill, Lanarkshire, Scotland, on October 6, 1850. He came to the United States in 1879 and worked as a mineralogist. read more »
Tailings and Mine Waste 1994 and the Boldness of Those Times
Monday, July 11, 2011
Today, July 11 is the deadline for submission of papers to the Tailings and Mine Waste 2011 conference. In preparation of one of my papers, I read through the proceedings of the 1994 conference. I am amazed at how bold the folk were in those days read more »
The U.S. Geological Survey Photographic Library
Wednesday, April 27, 2011
Free viewing and downloading of the entire USGS photographic collection. read more »
The Treadwell Gold Mines of Alaska,
Tuesday, April 26, 2011
John Treadwell, famed founder of the Treadwell Gold Mines, was a California carpenter with 12 years' experience in placer and lode mining in California and Nevada before he landed in Alaska in 1881. read more »
Steffen, Robertson, and Kirsten - The SRK of Mining
Tuesday, April 26, 2011
SRK has a new logo. Andy Robertson proudly explained that the two lines represented two soil or rock strata read more »
Gold production, resources and total inventories in British Columbia (1858-1998)
Tuesday, February 22, 2011
140 years of gold mining data for British Columbia, Canada. Plus 2010 exploration and mining data. read more »
History of Explosives and Blasting
Wednesday, February 09, 2011
In the US and Canada alone, blasters use more than 6 billion pounds of explosives and 75 million detonators per year. Coal mining accounts for two-thirds of consumed explosives of which more than 80% of it is ANFO. read more »
A History of Coal in Europe
Thursday, February 03, 2011
The Timber Crisis; The Fuel of Last Resort; Medieval Coal and Coal Mining; The Prejudice against Coal; Renaissance Coal Mines; Coke; Wagon ways, Steam Engines, Canal Building and Coal ...
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Sustainable Reclamation of Post-Mining Cartagena
Monday, November 01, 2010
Here is a link to the most fascinating presentation at the Tailings and Mine Waste 2010. It deals with reclamation planning in an area of Spain where mining continued for 2,500 years. read more »
10 Major American Mining Disasters
Friday, September 10, 2010
Since the beginning of the 20th century, thousands of Americans have been killed in mining accidents. Here are 10 major mining disasters that occurred in the states. read more »
Athenian Silver Mines at Laurion
Monday, August 23, 2010
It seems the ancient Greeks got most of the money to support their poetry, philosophy, development of “democracy,” and sundry other habits from mining. read more »
Mines along the old Route 66 - Photo gallery
Monday, August 16, 2010
Route 66 is a wonderful historic stretch of road. The section with the illustrious Gold Road mine is the longest stretch of Route 66 still in use today. read more »
Canadian Mining Events from 1604 to 1943
Thursday, August 12, 2010
... and Historical Tables of the Mineral production of Canada read more »
Pre-mechanized longwall mining of coal
Tuesday, August 03, 2010
Miners were able to remove almost all the coal from a section, either by leaving small remnant pillars or building packs to hold the roof in place, while that coal was removed. By retreating the face back towards the shafts, the overlying roof rock was then allowed to collapse into the void left by the coal removal.  read more »
Julius Benjamin Kruttschnitt
Tuesday, July 27, 2010
Julius Kruttschnitt was an internationally renowned American mining executive who spent half his life in Queensland, Australia working at Mount Isa Mines. He had a great impact on the Australian mining industry. read more »
Get gold, humanely if you can, but at all hazards get gold!
Tuesday, July 20, 2010

The Federal Reserve Bank of New York - The Key to the Gold Vault
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Tsumeb Mine: A history of copper mining in Namibia
Friday, July 16, 2010
The first written report of copper being seen in the Tsumeb area was made in 1857 when the Rhenish Missionaries H. Hahn and J. Rath in the company of hunter-trader F. Green made an expedition to the north with the objective of meeting with Ovambo chiefs. On June 17 they camped East of Grootfontein at the foot of the Otjitjika Mountain where they met Ovambo traders carrying neatly woven palm-leaf baskets that contained copper ore from the Otavi Mountains. read more »
Closure of Remote Historic Underground Mines in Desert Environments
Monday, July 05, 2010
Geotechnical solutions were developed for closure of two historic underground borate mines in the deserts of California: the old Borate Mine located in the Mojave Desert and the Lila C. Mine near Death Valley. read more »
Reed Gold Mine
Monday, May 31, 2010
One Sunday — supposedly in the spring — twelve-year-old Conrad Reed, son of John, chose to go fishing with several siblings in Little Meadow Creek on the family farm rather that attend church with his parents. While busy alongside the creek he saw "a yellow substance shining in the water." Its weight was later said to be approximately seventeen pounds. John Reed, unable to identify it, set the heavy stone aside as a useful doorstop and continued life as usual. read more »
U.S. Coal mine fatalities since 1970 map
Tuesday, April 06, 2010
U.S. mine disasters map read more »
A.P.Coleman - Professor and Geologist
Thursday, October 22, 2009
Canadian geologist, professor, minerals prospector, artist, Rockies explorer, backwoods canoeist, world traveller, scientist, popular lecturer, museum administrator, memoirist. Coleman was one of Canada’s most beloved scientists. "Geology was at once his vocation, his avocation and his recreation." (J.B. Tyrrell) There was always another mountain to climb; rock, clay and glacial till to examine. read more »
Exhibition Coal Mine Shows Work and Life of a Miner
Wednesday, August 26, 2009
Anybody interested in expanding the use of "clean coal" as an energy source and all visitors to Beckley, West Virgina should make it a point to stop and visit the Beckley Exhibition Coal Mine and the Youth Museum of Southern West Virginia. read more »
The gold metallurgy of Isaac Newton
Monday, August 03, 2009
The science of metals had always appealed to Isaac Newton and when, after the conclusion of his remarkable contributions to mathematics and physics, he was invited to take charge of the Royal Mint in London he was able not only to display his great gifts as an administrator but also to exercise his interest in metals and alloys and particularly in the metallurgy of gold. read more »
Gold metallurgy in the Twelfth Century
Monday, August 03, 2009
The simple basic properties of gold – its colour, great malleability and ductility, and its immunity from oxidation even on melting – were well known in the ancient civilizations. In prehistoric times, in Egypt, Babylon and other lands of the Near East, the fabrication of gold articles was equally well understood, as the many brief references throughout the Old Testament establish. read more »
California Gold Rush
Thursday, July 23, 2009
I. The Great Discovery - II. By Sea to the Golden Land - III. Ho for California! The Overland Trek IV. Via the Isthmus - V. Gold Mania Satirized - VI. The Miners' Ten Commandments VII.The World Rushed In: Part I, Part II - VIII. An Instant City: Sacramento - IX.The Northern Mines X. Scenes in the Life of the California Miner - XI. Making a Pile - XII. Mining Companies  read more »
History of Mineral Exploration in Canada
Thursday, July 16, 2009
Canada has a long and exciting history of mineral exploration and mining. Now a new book has been published that tells the successes of the industry since World War II. read more »
Comstock Lode
Friday, July 03, 2009
Nevada’s Comstock lode, America’s first great silver-mining district, was mired in fraud and corruption for the first half-century of its existence. read more »
Geology arrives in Nye County
Monday, June 15, 2009
When, in 1879, the U.S. Geological Survey was organized, Clarence King, leader of one of the Great Surveys, was chosen as its first director. One of King's first acts was to telegraph Samuel F. Emmons, who had been one of King's principal assistants on his big survey. Emmons was both a "cowboy," able to "ride, rope, and brand with the best of them," and a geologist. read more »
Electronic Journal on California Gold Rush and Gold Mining
Thursday, May 14, 2009
The Sierra College Press has published an electronic journal on the California Gold Rush and Gold Mining. This eJournal is the latest edition of Snowy Range Reflections: A Journal of Sierra Nevada History and Biography. read more »
The First Synthetic Diamond
Tuesday, May 05, 2009
Back in the 1950s the scientists from General Electric were not the only ones trying to make diamonds. read more »
Racialism in Mining
Thursday, April 23, 2009
Personal reflections on racialism in the mines of South Africa.  read more »
History of Asbestos Mining in Vermont
Friday, March 06, 2009
Asbestos is categorized as a group of fibrous metamorphic minerals of hydrous magnesium silicate variety. Asbestos was first mined in Vermont in 1899 on Belvidere Mountain. read more »
Justinian’s Gold Mines
Wednesday, December 03, 2008
During his reign the emperor Justinian has spent over 314 tonnes of gold. Where all this gold came from? Where are the mines that were able to produce that much gold?  read more »
Climax Molybdenum Mine
Wednesday, November 12, 2008
Kenwyn George was provided a tour of the tailings impoundments, water handling facilities and water treatment by Tavis D. Rogers, P.E., Senior engineer, of Climax Molybdenum on October 23, 2008. read more »
The Uranium Mill Tailings Remedial Action (UMTRA) Project
Wednesday, October 29, 2008
Here is the best summary of UMTRA I have come across: The Uranium Mill Tailings Radiation Control Act of 1978 gave the U.S. Department of Energy the responsibility of stabilizing, disposing, and controlling uranium mill tailings read more »
San Nicolas Archaeology
Monday, October 06, 2008
It is necessary to clear a prospective mine site for archaeological evidence before disturbing the earth. This short article is a brief review of a new book that brings insight and perspective to pre-history and its relevance to mining. read more »
California Mining History and Social Progress
Friday, October 03, 2008
The history of early mining camps in California provides insight into the development of the rule of law.  read more »
Herbert Hoover and the Principles of Mining
Monday, September 29, 2008
Herbert Hoover was both a mining engineer and a president of the United States. His book Principles of Mining provides fascinating insight into old ways of mining and investing.  read more »
SRK and 30 years of North American mine consulting
Friday, September 26, 2008
SKR celebrates thirty years of successful consulting to the mining industry in North America.  read more »
Inca Mining History
Wednesday, August 20, 2008
2000 years ago the Inca were mining hematite. This fascinating bit of early mining history comes by way of a report from MSNBC. Here are some abstracts from their report read more »
Bidim and Richards Bay
Thursday, July 31, 2008
I cannot find it on Google Earth. It stuck one kilometer out into the bay and was one kilometer wide, so it should still be visible. I refer to a phosphogypsum tailings impoundment I designed for Louis Luyt at Richards Bay in South Africa in the late 1970s. read more »
Connelly on Mine Groundwater
Tuesday, July 29, 2008
In the old days when SRK still went by its original name, Steffen Robertson and Kirsten, Dick Connelly and I were given the task of pounding the pavements to develop a groundwater practice in South Africa. read more »
East Geduld
Tuesday, July 22, 2008
At first there were one hundred houses. The number of your house pretty much reflected your rank on the mine in East Geduld, Transvaal, South Africa where I grew up. read more »
Pincock Allen & Holt
Thursday, July 17, 2008
I first met Kay Pincock, who founded the still venerable consulting company Pincock Allen & Holt, when he picked me up to take me to a restaurant on the east side of Tucson. read more »
Gilt Edge Mine Superfund Site
Thursday, June 12, 2008
The proceedings of Tailings & Mine Waste ’03 contains papers on the Gilt Edge Mine. There is an abstract on the water balance of the site proposed for the ’08 conference. read more »
Eagle and High Peak Mine, California
Monday, April 28, 2008
If you're up in the mountain town of Julian, CA (located about 60 miles northeast of San Diego), the Eagle and High Peak Mine is a must-visit. read more »
The Comstock Lode
Tuesday, April 22, 2008
Gold and silver strikes made millionaires and paupers, settled new cities, and civilized many parts of the West. But no other strike had more influence than the Comstock Lode read more »
The Hope Diamond
Friday, February 29, 2008
Louis XIV, of France bought the gem later known as the "Hope Diamond," in 1668, from a French Trader named, Jean-Baptiste Tavernier. read more »
SCHOTT Lighting Used at Bisbee Mining Museum
Tuesday, February 12, 2008
SCHOTT’s fiber optic products are helping illuminate the award winning Digging In exhibition at the Bisbee Mining & Historical Museum in Bisbee, Arizona. read more »
The Town That Joe Built
Friday, February 01, 2008
Nestled away in the rolling hills of the Franklin County area of southern Illinois lies the forgotten town that in 1904, was only a breath away from being the nations capital. read more »
The History of Rock Drilling
Tuesday, December 18, 2007
Although the method Agricola described for breaking rock might be regarded as the most primitive imaginable, the origins of metal mining in fact go back much further. read more »
My Darling Clementine: Monongah Mining Disaster
Thursday, December 06, 2007
The worst mining disaster in American History occurred in the community of Monongah, West Virginia on December 6, 1907. read more »
Unconventional Crude
Wednesday, November 07, 2007
The 12 November 2007 issue of the New Yorker includes an article called Unconventional Crude by Elizabeth Kolbert.  read more »
Ghost Towns
Wednesday, October 31, 2007
Here are extracts from an excellent blog article called Ghost Town. I repeat only the few paragraphs that deal with towns that reverted to the ghosts as a result of mine closure. read more »
Coal City
Thursday, September 27, 2007
If you go to Google.earth and zoom to Coal City, Indiana, you will see the town in question: a small community clustered around a north-south road, and surrounded by fields and reclaimed spoil piles. read more »
Underground Transport on Inclined Roads
Monday, September 10, 2007
Until the mid 20th century, pit ponies were one of the primary ways man and material was transported from underground coal mines. read more »
Archaeology and Mines: The Southern California Bight
Friday, August 10, 2007
On a clear day, Catalina Island stretches across the horizon twenty-five miles off the Huntington Beach coast. Many times I have walked the dog along the beach and gazed out at the far island. read more »
Jacksonville, Oregon
Friday, July 20, 2007
There are, or at some time in the past have been, at least 270 mines in Jackson County, Oregon (Mindat). In the Jacksonville District there are the Grace Diggings, Jacksonville Placer read more »
History of Metallurgy
Friday, July 13, 2007
A History of Metallurgy (1994) is edited by Fathi Habashi of the Department of Mining & Metallurgy, Laval University, Quebec City. It is a collection of articles from a multi-volume work. read more »
Thursday, May 31, 2007
Considered to be the most celebrated diamond in the Iranian Crown Jewels and one of the oldest known to man, the 186-carat Darya-i-Nur is a crudely fashioned stone measuring 41.40 x 29.50 x 12.15mm. read more »
Southern African Mining History
Wednesday, May 09, 2007
The 27 January 2007 issue of New Scientist reports that in 1795 in County Wicklow in Ireland, a local teacher found gold in the local river. For six glorious weeks the locals panned for gold, recovering 80 kilograms. Then the usual happened read more »
Labradorite, Aurora Borealis Entombed in Stone
Monday, April 23, 2007
The name Labradorite comes from the Canadian province of Newfoundland and Labrador, which is a famous locality for the stone. The mineral was discovered by Moravian missionaries at Ford Harbour read more »
History of Amethyst
Monday, March 12, 2007
The name "amethyst" comes from the Greek meaning "not drunken," and Amethyst has long been considered to be a strong antidote against drunkenness. read more »
Stone to Nuclear
Wednesday, February 28, 2007
Bomvu Ridge 40,000 years ago may have been the first large-scale underground mine anywhere. Australia well populated 60,000 years ago? read more »
Mine Sand Piles
Thursday, February 22, 2007
My father regularly drove us out to those piles of golden sand, so soft and warm in the summer sun. And here we would spend happy hours climbing up the sand and sliding down, and climbing up and sliding down read more »
The Klondike Rainmaker
Wednesday, February 14, 2007
Historically, most of the gold recovered in the Yukon and Alaska was recovered by placer mining, which involves the separation of loose particles of gold from the surrounding sand or gravel read more »
Mining and the Twelve Days of Christmas
Thursday, December 28, 2006
A blog-like review of the 2006 mining industry, mining technology, and the twelve days of christmas, and prospects for mining in 2007.  read more »
Monday, December 18, 2006
Three examples of what make the British unique (I emphasize, that to the best of my knowledge I have no British ancestors going back at least three generations.) read more »
Tiger's-Eye, Yesterday's Diamond
Tuesday, November 21, 2006
In London in the mid-1870s, 25 shillings-about $85 in today's terms-went a long way. You could buy 7 grams of gold, 40 liters of rum, or about a half kilogram of opium. read more »
A Life Underground in the Cornish Tin Mines
Wednesday, November 15, 2006
Any job working below the earth's surface is potentially hazardous and tin mining in the southwest of England was no different. In the 18th and 19th centuries, it was commonplace for children to be employed at the tin mines. read more »
Mining Lamps
Friday, November 10, 2006
Here we show you a miner's oil lamp made from sturdy cast iron, which comes from the 1800's from Peru. Whale oil, a wick and a strong wrist was all that was required to bring light to the working face. read more »
The First Synthetic Diamond
Wednesday, November 1, 2006
Back in the 1950s the scientists from General Electric were not the only ones trying to make diamonds. Unknown to them, in a magnificent old hunting palace on the outskirts of Stockholm read more »
George Rappelyea
Tuesday, October 31, 2006
One mining engineer I would love to have met and about whom I would love to know more is George Rappelyea. read more »
The Cullinan Diamond
Friday, October 20, 2006
At first, the mine superintendent thought he was the brunt of a practical joke. While making a routine check of the premises at the end of the day, Frederick Wells caught the reflection of the setting sun glimmering off the wall of the mine shaft. read more »
Letseng-la-Terae: The 603 Carat Lesotho Promise Diamond
Friday, October 13, 2006
Letseng is a mine best described by superlatives. At 3,100 m altitude it is the world's highest diamond mine; at just over 2 carats per 100 tones (cpht) it is the world’s lowest grade kimberlite mine; at over $1,200 a carat it has the world's highest average cost per carat... read more »
The Legend of Saint Barbara, Patron Saint of Mines
Monday, October 2, 2006
Barbara lived in the 3rd Century AD in Nicromedia, the capital of the Roman province of Bithnia (Asia Minor). She was the only child of Dioscuros, a high ranking and wealthy man. read more »
Looking Back... On Orvil Jack
Thursday, September 14, 2006
Have you ever seen Orvil Jack turquoise? It's not something that you'll forget, especially the vivid green stones that have become its trademark color. read more »
Friday, September 08, 2006
Paranumismatics are known by several names depending on which coalfield or even region of a coalfield they hailed from. read more »