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Aquamarine is between 7(Quartz) and 8(Topaz) on MOHs scale of hardness. But, Aquamarine is closer to 8(Topaz) than 7(Quartz). :-)
The hardness of Turqoise is a 5-6 on the Mohs hardness scale.
how hard is diatomite on mohs scale
Quartz has the value of 7 on the Mohs scale.
It is about 2.5 in the Mohs Hardness Scale.
Amber is 2-3 on the mohs scale of hardness.
Tourmaline has a hardness of 7-7.5 on the Mohs hardness scale.
4
9 on the mohs scale
Extremely hard about 9.5 on Mohs' scale
On the Mohs scale, 6.5 to 7.0.
On the Mohs scale, 6.5 to 7.0.