mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
Hardness: 7.5-8.0 (Mohs scale), Color: Green (from chromium/vanadium), Luster: Vitreous, Crystal structure: Hexagonal prism, Cleavage: Imperfect basal, Specific gravity: 2.67-2.85
- Hardness
- 7
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Physical properties
Hardness: 7.5-8.0 (Mohs scale), Color: Green (from chromium/vanadium), Luster: Vitreous, Crystal structure: Hexagonal prism, Cleavage: Imperfect basal, Specific gravity: 2.67-2.85
Formation & geological history
Formed in metamorphic or igneous environments, specifically pegmatites or hydrothermal veins where beryllium is present. Most emeralds are from the Mesozoic or Cenozoic eras.
Uses & applications
Primarily used as a gemstone in high-end jewelry and for mineral specimen collecting.
Geological facts
Emeralds are one of the 'Big Four' precious stones. This specimen shows a raw crystal embedded in its host rock, which is likely schist or quartz.
Field identification & locations
Identify by its distinct hexagonal crystal habit and vivid green color. Common locations include Colombia, Brazil, Zambia, and North Carolina (USA).
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Schist
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Nephrite Jade
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Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral