gemstone
Emerald in Quartz Matrix
Beryl (Be3Al2Si6O18) with Chromium trace elements
Hardness: 7.5-8 on Mohs scale; Color: Deep green (Chrome green); Luster: Vitreous to greasy; Crystal structure: Hexagonal; Cleavage: Poor/Indistinct; Specific gravity: 2.76.
- Hardness
- 7
- Color
- Deep green (Chrome green)
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7.5-8 on Mohs scale; Color: Deep green (Chrome green); Luster: Vitreous to greasy; Crystal structure: Hexagonal; Cleavage: Poor/Indistinct; Specific gravity: 2.76.
Formation & geological history
Formed in hydrothermal veins or pegmatites where beryllium-rich fluids meet chromium or vanadium-rich rocks. Most high-quality specimens are found in metamorphic environments or sedimentary host rocks.
Uses & applications
Primarily used as a gemstone in high-end jewelry. Carved specimens or raw matrix pieces are popular for mineral collectors and metaphysical practitioners.
Geological facts
Emerald is the green variety of Beryl. The presence of chromium is specifically what gives it the distinct 'emerald' green color compared to other green beryls. Evidence of its use dates back to 1500 BCE in Ancient Egypt.
Field identification & locations
Look for the distinct hexagonal crystal habit and the specific 'emerald' shade of green. It is often found associated with white quartz or black schist matrix. Common locations include Colombia, Brazil, and Zambia.
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