Why is topaz so hard?

Johnnie Rath asked a question: Why is topaz so hard?
Asked By: Johnnie Rath
Date created: Tue, Mar 9, 2021 9:32 AM
Date updated: Tue, Jul 5, 2022 3:26 PM


Top best answers to the question «Why is topaz so hard»

Topaz stone is a fluorine-containing aluminum silicate of formula Al2SiO4 (F, OH) 2 and may contain traces of other metals. The result is a very hard mineral, hardness 8 on the Mohs scale. In comparison, topaz is less hard than rubies, sapphires and diamonds, but harder than emerald, beryl, tourmaline or aquamarine.

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