Pinterest • The world’s catalog of ideas

What an excellent example of crystals at work! These natural minerals and mineralogy are occasionally reworked into gemstones (depending on size).

Some of the most beautiful minerals and stones

The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science.[1] The method of comparing hardness by seeing which minerals can scratch others, however, is of great antiquity, having first been mentioned by Theophrastus in his treatise On

Etsyfrom Etsy

Vintage Geology Wall Chart - Rocks & Minerals

Vintage Geology Wall Chart Rocks & Minerals by HoofAndAntler