gemstone
Emerald (or possibly Green Glass / Slag)
Beryl (Be3Al2(SiO3)6)
Hardness: 7.5 to 8 on the Mohs scale; Color: Vivid green; Luster: Vitreous to sub-resinous; Crystal System: Hexagonal; Specific Gravity: 2.76 to 2.80
- Hardness
- 7
- Color
- Vivid green
- Luster
- Vitreous to sub-resinous
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Physical properties
Hardness: 7.5 to 8 on the Mohs scale; Color: Vivid green; Luster: Vitreous to sub-resinous; Crystal System: Hexagonal; Specific Gravity: 2.76 to 2.80
Formation & geological history
Formed in hydrothermal veins or pegmatites where beryllium-rich fluids interact with surrounding host rock, often in metamorphic environments.
Uses & applications
Used primarily as a precious gemstone in fine jewelry and as a mineral specimen for collectors.
Geological facts
Emeralds are among the rarest and most treasured gemstones in the world, often containing inclusions known as 'jardin' (garden) that give each stone unique character.
Field identification & locations
Look for characteristic green color, hexagonal crystal structure, and inclusions. Found worldwide including Colombia, Zambia, Brazil, and Pakistan. Note: The piece in the image strongly resembles cullet glass or slag due to conchoidal fracturing and bubbles, so physical testing (hardness/refractive index) is recommended.
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