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Beryl
IMA-Approved Mineral Species
Properties and Data
Physical Properties
Composition
Be
3
Al
2
(Si
6
O
18
)
Chemical Name
Beryllium Aluminium Cyclosilicate
Molecular Weight
537.492 g/mol
Density
2.63 - 2.92 g/cm
3
Mohs Hardness
7.5 - 8
Member of
Beryl Group
Crystal System
Hexagonal
Optical Properties
Type
Uniaxial (-)
Refractive Index
n
ω
= 1.568 - 1.602
n
ε
= 1.564 - 1.595
Dispersion Factor
0.014
Birefringence
δ = 0.004 - 0.007
Additional Information
Otherwise known by Goshenite, Emerald, Morganite, Red Beryl, Aquamarine, Heliodor, Maxixe, Davidsonite, Rosterite, or Vorobyevite
Material articles have temporarily been disabled for renewal and polishing.
Variants and Types
Emerald
Emerald
Color: Green, Cyan, Lime
Fluorescence: Red
Cause: Chromium, Vanadium, Copper and Iron Ions
Morganite, Red Beryl
Morganite, Red Beryl
Color: Pink, Magenta, Red
Cause: Manganese Ions
Aquamarine, Heliodor
Aquamarine, Heliodor
Color: Blue, Cyan, Yellow, Orange
Cause: Iron Ions
(Needs Research)
(Needs Research)
Color: Blue, Cyan, Green
Cause: Cobalt, Copper, and other Ions.
Effect: Pleochroism
Red Beryl
Red Beryl
Color: Red, Orange
Cause: Cobalt and Manganese Ions
Production and Synthesis
Hydrothermal Method
Hydrothermal Method
Involves suspending a seed crystal into a high pressure / high temperature autoclave with liquid ingredients. Sometimes produces optics-grade ingots.
Flux Method
Flux Method
Involves suspending a seed crystal near or inside flux with ingredients. Allows lower-temperature production. Sometimes produces gem-grade crystals.
References
REFERENCES
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