gemstone
Emerald
Beryl (Be3Al2(SiO3)6)
Hardness: 7.5 to 8 on the Mohs scale. Color: Green, bluish-green to yellowish-green. Luster: Vitreous. Crystal structure: Hexagonal. Specific gravity: 2.68 to 2.78.
- Hardness
- 7
- Color
- Green, bluish-green to yellowish-green
- Luster
- Vitreous
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Physical properties
Hardness: 7.5 to 8 on the Mohs scale. Color: Green, bluish-green to yellowish-green. Luster: Vitreous. Crystal structure: Hexagonal. Specific gravity: 2.68 to 2.78.
Formation & geological history
Formed in metamorphic environments, typically in pegmatites or hydrothermal veins where beryllium-rich fluids interact with surrounding rocks.
Uses & applications
Used primarily as a precious gemstone in fine jewelry, as well as in collector specimens.
Geological facts
Emerald is one of the four traditional precious gemstones (along with diamond, ruby, and sapphire). Its vibrant green color is caused by trace amounts of chromium and vanadium.
Field identification & locations
Identified by its distinctive hexagonal crystal system, vitreous luster, and characteristic green color. Common localities include Colombia, Zambia, Brazil, and Zimbabwe.
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