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Rock guide

emerald

gem · uncommon

Quick facts

Formula
Be3Al2(SiO3)6
Hardness
7.5-8
Luster
Vitreous
Colors
Green

Emerald is a green gemstone and a variety of the mineral beryl. It is highly valued for its rich color and rarity.

Look for a deep green color and possible inclusions, which are common in natural emeralds.

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