Kyawthuite
Real mineral · legendary · BiSbO₄
The rarest mineral on Earth by specimen count. Exactly one crystal is known, discovered in the Mogok gem fields of Myanmar and described as a new species in 2015. Bismuth antimonate of exceptional density. All known properties derive from a single 0.448 gram specimen.
Identity
- Formula
- BiSbO₄
- Chemical class
- oxide
Crystallography
- Crystal system
- orthorhombic
- Habits
- rounded, massive
- Fracture
- conchoidal
Physical properties
- Mohs hardness
- 5
- Density
- 8.37 g/cm³
- Luster
- adamantine
- Colors
- orange, amber
- Streak
- pale yellow
- Transparency
- transparent
Geology
- Origins
- metamorphic
- Host rocks
- alluvial deposits
- Associated minerals
- Spinel, Ruby, Sapphire
- Geography
- Myanmar (Mogok only)
Classification
- Rarity
- legendary
- Gem quality
- Yes
Arcane properties
- Affinity
- arcane, void
- Effects
- planar travel, time
- Planar origin
- Material Plane
Browse the Crystal Encyclopedia — MGS Toolbox