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magnesite - student specimens of pale gray magnesium carbonate - UNIT OF 5 SPECIMENS

$ 4.20

Magnesite, magnesium carbonate, MgCOcan be earthy or crystalline. This earthy magnesite was formed through hydrothermal alteration of Miocene (?) lake beds, though it can also form in irregular veins and masses through the alteration of serpentine by water containing carbonic acid. Some of these specimens show faint bedding.

A gold strike in February, 1926, turned Kramer Hills into a boomtown - for about 18 months. MIners poured in from all over, with the camp reaching roughly 1,200 residents by April. The April 22, 1926 San Bernardino Sun reported that gold was being freely panned in many prospects. The mining camp had a grocery store, bakery, hotel, pool hall, sign shop, radio shop, several cafes, two dance halls, a lighting plant for electricity, a telephone exchange, and a newspaper.

Summer heat and the lack of gold in almost all of the prospects put an end to the excitement and by 1928 the mining camp had dried up.

The Kramer Hills magnesite deposit was explored in the 1930s by the Ball (Red Seal) Chemical Company. A number of prospects have been opened since then, but it appears that commercial production was small. It has a commercial application in the manufacture of brick and furnace linings. The magnesite occurs in association with a tan chert that we often have in stock.

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