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Home / Encyclopedia / Red Beryl

Red Beryl

Crystal system · Hexagonal

Identity

Formula

Be3Al2Si6O18

IMA symbol

Brl

Crystal system

Hexagonal

Point group

6/mmm

Rarity

rare

Variety of

Physical properties5 recorded

Hardness

7.5–8 (Mohs)

Refractive index

1.564–1.578

Birefringence

0.006

Dispersion

0.014

Optic character

uniaxial (−)

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