A pearl is composed of the mineral aragonite which has a hardness of 3.5-4.0.
It is about 2.5 in the Mohs Hardness Scale.
9 on the mohs scale
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On the Mohs scale, 6.5 to 7.0.
how hard is diatomite on mohs scale
Quartz has the value of 7 on the Mohs scale.
A pearl is composed of the mineral aragonite which has a hardness of 3.5-4.0.
Amber is 2-3 on the mohs scale of hardness.
It is about 2.5 in the Mohs Hardness Scale.
Tourmaline has a hardness of 7-7.5 on the Mohs hardness scale.
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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.
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