mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
AI-generated identification · may be incorrectHardness: 7.5-8.0 (Mohs); Color: Green; Luster: Vitreous; Crystal Structure: Hexagonal; Cleavage: Poor/Indistinct; Specific Gravity: 2.67-2.78
- Hardness
- 7
- Color
- Green
- Luster
- Vitreous
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Physical properties
Hardness: 7.5-8.0 (Mohs); Color: Green; Luster: Vitreous; Crystal Structure: Hexagonal; Cleavage: Poor/Indistinct; Specific Gravity: 2.67-2.78
Formation & geological history
Formed in pegmatites or hydrothermal veins where beryllium is present near chromium or vanadium sources; typically metamorphic or igneous environments.
Uses & applications
Highly valued gemstone for jewelry and a prized mineral for collectors.
Geological facts
The green color is due specifically to trace amounts of chromium or vanadium. Most emeralds contain surface-reaching fissures and inclusions, often called 'jardin' (French for garden).
Field identification & locations
Identify by its distinct hexagonal crystal habit and vibrant green color. Commonly found in Colombia, Brazil, and Zambia. Collectors look for clarity and color saturation.
