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Rock guide

Serpentine

rock · common

Quick facts

Formula
(Mg,Fe)3Si2O5(OH)4
Hardness
2.5–5.5
Luster
Greasy, waxy, silky
Colors
Green, yellow, black, brown

Serpentine is a group of minerals that are often green and have a greasy or waxy luster. They are commonly used as decorative stones.

Look for a greasy feel and green color, often with a massive form.

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