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Corundum

Craigmont Mine, Raglan twp., Renfrew co., Ontario
Canada
Dimensions: 4.7x5.3x6.8 cm
Largest crystal size: 41 mm
Price: CA

A well formed, hexagonal, brown corundum crystal with a sharp termination at the tip. The crystal sits nicely on its syenite matrix. There is a saw mark at the base of the specimen, very reasonable as these crystals are very difficult to get out of the hard host rock, especially while keeping the crystal intact like this! The specimen is from this old corundum mine, in the Grenville Geological Province. Historic!

From mindat:

This deposit was the province's first producer of corundum and was discovered in 1876 but was not mined until 1900. It is a syenite pegmatite in an albite-nepheline gneiss. The largest crystal of corundum is reported to be 8 inches by 6.25 inches.

The Craigmont mine was operated from 1900 to 1907 by the Canada Corundum Company, Limited. From 1908 to 1913 the mine was leased to the Manufacturers Corundum Company. On February 3, 1913, the mill at Craigmont was destroyed by fire. In 1919, Corundum, Limited, leased the properties of the Manufacturers Corundum Company and built a new 100-ton mill at Craigmont to treat tailings, of which it was estimated there were 300,000 tons. Grain corundum was produced from December 1919, until the mill closed down in June 1921. (ARV53)

Note: All prices are in Canadian dollars (CAD). International customers are charged in CAD, exchange rate is calculated automatically by your bank/paypal upon checkout.

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D Joyce Minerals
Rare Canadian & Global
Minerals, since 1983

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