Danburite
Real mineral · rare · CaB₂Si₂O₈
Calcium boron silicate forming colourless to pale yellow prismatic crystals in metamorphic and hydrothermal environments. Its excellent transparency and high refractive index make it a viable diamond simulant when faceted.
Identity
- Formula
- CaB₂Si₂O₈
- Chemical class
- silicate
Crystallography
- Crystal system
- orthorhombic
- Habits
- prismatic, wedge-shaped
- Fracture
- subconchoidal
Physical properties
- Mohs hardness
- 7
- Density
- 3 g/cm³
- Luster
- vitreous
- Colors
- colorless, pale yellow, pink, white
- Streak
- white
- Transparency
- transparent
Geology
- Origins
- metamorphic, hydrothermal
- Host rocks
- skarn, marble, evaporite
- Associated minerals
- feldspar, Quartz, Calcite, Diopside
- Geography
- Mexico, Japan, Myanmar, Russia, USA (Connecticut)
Classification
- Rarity
- rare
- Gem quality
- Yes
Arcane properties
- Affinity
- light, arcane
- Effects
- warding, scrying
- Planar origin
- Material Plane
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