mineral
Emerald
Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities
AI-generated identification · may be incorrectHardness: 7.5-8.0 Mohs, Color: Deep green, Luster: Vitreous, Crystal Structure: Hexagonal, Cleavage: Indistinct, Specific Gravity: 2.67-2.78
- Hardness
- 7
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Physical properties
Hardness: 7.5-8.0 Mohs, Color: Deep green, Luster: Vitreous, Crystal Structure: Hexagonal, Cleavage: Indistinct, Specific Gravity: 2.67-2.78
Formation & geological history
Formed in hydrothermal veins or pegmatites where beryllium-rich fluids interact with chromium or vanadium-bearing rocks; often metamorphic in origin.
Uses & applications
Primarily used as a gemstone in high-end jewelry and as a valuable collector's mineral.
Geological facts
Emeralds are often known for their 'jardin' (garden), which refers to the natural inclusions within the stone. Rare clean specimens can be more valuable than diamonds.
Field identification & locations
Check for a deep green hue and characteristic hexagonal crystal shape. Common locations include Colombia, Brazil, and Zambia. Often contains surface-reaching fissures.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary