mineral

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Hardness: 7.5-8 on Mohs scale; Color: Green to bluish-green; Luster: Vitreous (glass-like); Crystal structure: Hexagonal; Cleavage: Imperfect/Poor; Specific gravity: 2.76

Hardness: 7
Color: Green to bluish-green
Luster: Vitreous (glass-like)

Identified March 28, 2026More mineral →

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Physical properties

Hardness: 7.5-8 on Mohs scale; Color: Green to bluish-green; Luster: Vitreous (glass-like); Crystal structure: Hexagonal; Cleavage: Imperfect/Poor; Specific gravity: 2.76

Formation & geological history

Formed in metamorphic or igneous environments where hydrothermal fluids interact with beryllium-rich pegmatites and chromium-rich host rocks. Formation ages range from hundreds of millions to billions of years depending on the deposit location.

Uses & applications

Primary use is in high-end jewelry as a gemstone and as a popular specimen for mineral collectors. Industrial beryllium is rarely sourced specifically from emerald due to the gem's value.

Geological facts

Emeralds are one of the 'Big Three' precious gemstones alongside rubies and sapphires. Unlike most gems, inclusions in emeralds are often referred to as a 'jardin' (garden) and can enhance the character of the stone rather than detracting from it.

Field identification & locations

Identify by its distinct hexagonal crystal habit and characteristic green color. Found primarily in Colombia, Brazil, Zambia, and Ethiopia. Collectors should look for 'trapiche' patterns or intact crystal terminations in matrix.

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