Soudé Emerald (Doublet) crystal structure
hexagonal composite

Soudé Emerald (Doublet)

Be3Al2Si6O18 (colourless beryl) + green cement

Quick Facts

Hardness
7.5
Specific Gravity
2.68
Refractive Index
1.57

Crystal Structure

hexagonal

Physical Properties

Crystal Systemhexagonal
Hardness (Mohs)7.5
Specific Gravity2.68
LustreVitreous

Optical Properties

Refractive Index1.57
Birefringence0.006

Origin & Identification

Origincomposite

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Natural Counterpart

The natural gem this composite imitates

Emerald
Emerald natural
Be3Al2(SiO3)6:Cr

Related Minerals

Other minerals in the hexagonal system

Apatite
Apatite
Ca5(PO4)3(F,Cl,OH)
Aquamarine
Aquamarine
Be3Al2(SiO3)6:Fe
Beryl (Hexagonal Prism)
Beryl (Hexagonal Prism)
Be3Al2Si6O18
Beryl (Tabular)
Beryl (Tabular)
Be3Al2Si6O18
Emerald
Emerald
Be3Al2(SiO3)6:Cr
Flux-Grown Emerald (Crystal)
Flux-Grown Emerald (Crystal)
Be3Al2(SiO3)6:Cr
View all hexagonal minerals →

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FundamentalsCrystal SystemsFundamentalsOptical PropertiesFundamentalsPhysical Properties