gemstone
Emerald In Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
Hardness: 7.5-8.0 Mohs; Color: Pale green to intense green; Luster: Vitreous; Crystal Structure: Hexagonal; Cleavage: Poor/Indistinct; Specific Gravity: 2.67-2.78
- Hardness
- 7
- Color
- Pale green to intense green
- Luster
- Vitreous
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Physical properties
Hardness: 7.5-8.0 Mohs; Color: Pale green to intense green; Luster: Vitreous; Crystal Structure: Hexagonal; Cleavage: Poor/Indistinct; Specific Gravity: 2.67-2.78
Formation & geological history
Formed in hydrothermal veins or pegmatites where beryllium-rich fluids interact with chromium-bearing metamorphic rocks (like mica schists). Often found in Precambrian to Cenozoic deposits.
Uses & applications
Used primarily in jewelry as a precious gemstone. Lower-grade specimens are highly sought after by mineral collectors for their matrix aesthetics.
Geological facts
Emerald is one of the four recognized precious gemstones. The green color is caused by trace amounts of chromium or sometimes vanadium. Flawless emeralds are extremely rare and can be more valuable than diamonds.
Field identification & locations
Identify by the characteristic hexagonal prismatic crystal habit and distinct green color. Often found embedded in black schist or white quartz matrix. Major locations include Colombia, Brazil, and Zambia.
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