Sapphire
Real mineral · very rare · Al₂O₃
Corundum coloured blue by iron and titanium impurities. The same mineral species as ruby, distinguished only by colour. Formed in metamorphic and igneous environments, often recovered from alluvial deposits.
Identity
Crystallography
- Crystal system
- trigonal
- Habits
- tabular, prismatic, pyramidal
- Fracture
- conchoidal
Physical properties
- Mohs hardness
- 9
- Density
- 4 g/cm³
- Luster
- vitreous, adamantine
- Colors
- blue, sky blue, dark blue, yellow, pink, colorless, orange
- Streak
- white
- Transparency
- transparent, translucent
Geology
- Origins
- metamorphic, igneous
- Host rocks
- marble, basalt, gneiss
- Associated minerals
- Ruby, Spinel, Tourmaline, Zircon
- Geography
- Sri Lanka, Myanmar, Madagascar, Australia, Kashmir
Classification
- Rarity
- very rare
- Gem quality
- Yes
Arcane properties
- Affinity
- water, air
- Effects
- scrying, mind
- Planar origin
- Material Plane
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