Mohs Scale 9 Corundum
Corundum var Ruby, 3.7 cm high
Gene & Roz Meieran Collection
Image Credit and Copyright: Jeff Scovil
Corundum
Corundum
Mohs: 9, Absolute: 400
Mohs: 9, Absolute: 400
Sapphire and ruby are varieties of corundum. Besides the gem varieties, it is mostly used as an abrasive in sandpaper and other grinding tools.
Sapphire and ruby are varieties of corundum. Besides the gem varieties, it is mostly used as an abrasive in sandpaper and other grinding tools.
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8: Topaz
8: Topaz
10: Diamond
10: Diamond
