Jeremejevite
Real mineral · legendary · Al₆B₅O₁₅(F,OH)₃
First described in 1883 from a single Siberian locality. For nearly a century only a handful of specimens existed worldwide. The discovery of Namibian deposits provided more material, but facetable crystals remain extraordinarily rare. Its sky-blue colour rivals fine aquamarine at a fraction of the availability.
Identity
- Formula
- Al₆B₅O₁₅(F,OH)₃
- Chemical class
- borate
Crystallography
- Crystal system
- hexagonal
- Habits
- prismatic, pyramidal
- Fracture
- conchoidal
Physical properties
- Mohs hardness
- 6.5
- Density
- 3.28 g/cm³
- Luster
- vitreous
- Colors
- sky blue, pale blue, colorless, pale yellow
- Streak
- white
- Transparency
- transparent
Geology
- Origins
- igneous
- Host rocks
- pegmatite, granite
- Associated minerals
- Quartz, feldspar, Tourmaline
- Geography
- Namibia, Russia (Siberia), Myanmar, Tajikistan
Classification
- Rarity
- legendary
- Gem quality
- Yes
Arcane properties
- Affinity
- air, light
- Effects
- scrying, mind
- Planar origin
- Material Plane
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