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Latest Mohs scale of mineral hardness Stories

2014-02-03 20:20:18

SAN JOSE, Calif., Feb. 3, 2014 /PRNewswire/ -- Westpak, Inc., a local product and package testing laboratory, has added Hardness Testing to its expanding set of Material Analysis test capabilities. Using state-of-the-art equipment, Westpak evaluates the hardness of metal and plastic samples using established industry protocols ASTM E18, ASTM D785, and ISO 6508. Westpak's hardness tester determines the Rockwell hardness of test samples by utilizing indenters and force loads of 60 Kg,...


Latest Mohs scale of mineral hardness Reference Libraries

28_e16534ea8c7ef40ad332fe9c4acaa1a9
2005-05-26 11:05:25

Corundum is the crystalline form of aluminium oxide and one of the rock-forming minerals. Corundum is naturally clear, but can have different colors when impurities are added. Transparent specimens are used as gems, called ruby if red, while all other colors are called sapphire. The word corundum comes from the Hindi kurand. The oxygen atoms in corundum are arranged in a hexagonal close-packing, with the smaller aluminium atoms occupying 2/3 of the octahedral gaps. The coordination of the...

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