3 ms·
Sapphire has, by definition, 9/10 on Moh's hardness scale. http://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness http://en.wikipedia.org/wiki/Mohs_scale_o
by DrStalker 14y ago
Sapphire has, by definition, 9/10 on Moh's hardness scale.
http://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness http://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness
(Sapphire is just Corundum that isn't red or pink)
- regularfry 14y agoSpecifically, it's corundum that's blue because it's got titanium and iron impurities. Anyone trying to sell you a "white sapphire" (or this "sapphire" glass) is trying to pull the wool over your eyes. I can see why, though - it's an easier sell than calling it just corundum.