mineral
Emerald in Host Rock
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Hardness: 7.5-8.0 on Mohs scale; Color: Green to bluish-green; Luster: Vitreous; Crystal system: Hexagonal; Specific gravity: 2.67-2.78; Fracture: Conchoidal/uneven.
- Hardness
- 7
- Color
- Green to bluish-green
- Luster
- Vitreous
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Physical properties
Hardness: 7.5-8.0 on Mohs scale; Color: Green to bluish-green; Luster: Vitreous; Crystal system: Hexagonal; Specific gravity: 2.67-2.78; Fracture: Conchoidal/uneven.
Formation & geological history
Formed in hydrothermal veins or pegmatites where beryllium-rich fluids interact with chromium or vanadium-bearing rocks. Often found in schist or marble environments.
Uses & applications
High-end jewelry, gemstone collection, and mineral specimen display.
Geological facts
Emeralds are one of the 'Big Four' precious stones. Inclusions within emeralds are often called 'jardin' (garden) because of their mossy appearance. Flawless emeralds are extremely rare and often more valuable than diamonds.
Field identification & locations
Identify by its distinctive hex-prism crystal habit and rich green color. Commonly found in Colombia, Zambia, Brazil, and Ethiopia. Collectors should look for clarity and saturation of color.
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