mineral

Rough Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

AI-generated identification · may be incorrect

Hardness: 7.5-8.0 on Mohs scale; Color: Deep green (emerald) with grey/white host rock (matrix); Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Specific Gravity: 2.67-2.78.

Hardness: 7
Color: Deep green (emerald) with grey/white host rock (matrix)
Luster: Vitreous to greasy

Identified March 23, 2026More mineral →

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Physical properties

Hardness: 7.5-8.0 on Mohs scale; Color: Deep green (emerald) with grey/white host rock (matrix); Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Specific Gravity: 2.67-2.78.

Formation & geological history

Formed in metamorphic or hydrothermal environments where beryllium-bearing pegmatites come into contact with chromium-rich mafic or ultramafic rocks. Common in schist or marble host rocks.

Uses & applications

Mostly used for gemstone jewelry when gem-grade; non-gem grade specimens are highly valued by mineral collectors for display and scientific study.

Geological facts

Emeralds are green beryl; the green hue comes from trace amounts of chromium or vanadium. Most natural emeralds (over 90%) contain surface-reaching inclusions or 'gardens' (jardin) that prove their natural origin.

Field identification & locations

Identify in the field by looking for translucent green hexagonal prisms embedded in darker schist or lighter calcite matrix. Common locations include Colombia, Brazil, and Zambia.