Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: Robert M. Lavinsky · CC BY-SA 3.0
Beryl
Be₃Al₂Si₆O₁₈
Gemstone: cyclosilicate
Properties
- Chemical formula
- Be₃Al₂Si₆O₁₈
- Group
- Silicates
- Crystal system
- Hexagonal
- Hardness (Mohs)
- —
- Color
- Green
- Luster
- —
- Streak
- White
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- P6/mcc
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.CJ.05
- Dana classification
- 61.1.1.1
- IMA status
- Grandfathered mineral (G)
- IMA symbol
- Brl
- Locality
- 🇪🇬 Mons Smaragdus
- Type locality
- —
- Discovery year
- —
Etymology
Named after Beryllos 3 (Pauly-Wissowa)
Source: Wikidata
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