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Emerald rough stones

Property Specification
Chemical Composition Beryllium Aluminum Silicate (Be3Al2(SiO3)6)
Color Green (varies from light to dark green)
Hardness (Mohs scale) 7.5 to 8
Density 2.67 to 2.78 g/cm³
Crystal System Hexagonal
Refractive Index 1.57 to 1.60
Cleavage Imperfect (in two directions)
Transparency Transparent to translucent
Luster Vitreous (glassy)
Fracture Conchoidal (smooth, curved surfaces)
Inclusions Commonly contains inclusions, known as "jardin" (garden)
Shape Irregular to ovoid, depending on the rough specimen
Size Varies (from small fragments to large boulders)
Color Intensity Dependent on origin, typically more intense from Colombia
Origin Mainly found in Colombia, Zambia, Brazil, and Afghanistan
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