Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: Ra'ike (see also: de:Benutzer:Ra'ike) · CC BY 3.0
Howlite
Ca₂B₅SiO₉(OH)₅
Inoborate mineral
Properties
- Chemical formula
- Ca₂B₅SiO₉(OH)₅
- Group
- Silicates
- Crystal system
- Monoclinic
- Hardness (Mohs)
- —
- Color
- White
- Luster
- —
- Streak
- White
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- —
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 6.CB.20
- Dana classification
- 25.3.5.1
- IMA status
- Grandfathered mineral (G)
- IMA symbol
- How
- Locality
- —
- Type locality
- —
- Discovery year
- —
Etymology
Named after Henry How
Source: Wikidata
For sale on the marketplace
View all →
No offers for Howlite at the moment. Browse the marketplace →
