Guide
Jeremejevite
52 in the gallery
Jeremejevite is a rare aluminum borate mineral that occurs as transparent to pale-colored crystals. It typically forms in hexagonal prismatic crystals or as tabular to wedge-shaped aggregates, and can exhibit a vitreous to adamantine lustre. The mineral’s color ranges from colorless to pale yellow, with some specimens showing delicate lavender or bluish tints, depending on trace impurities.
- Formula
- Al6B5O15(F,OH)3
- Rarity
- Rare
- Stability
- Stable
- Collector interest
- Very High Interest
- Classification notes
- Borate; Strunz 6.AB nesoborates with additional anions
Key characteristics
- Crystal system
- hexagonal
- Mohs hardness
- 6.5–7.5
- Specific gravity
- 3.28–3.31
- Luster
- vitreous
- Transparency
- transparent, translucent
- Color
- colorless, white, yellow, blue, violet, brown
- Streak
- white
- Cleavage
- none
- Fracture
- conchoidal, uneven
- Crystal habit
- prismatic, pyramidal, acicular, granular, massive
- Gem mineral
- Classic / historic
Where Jeremejevite is found
Top localities
- Erongo Mountains26 specimens
- Ameib Farm 605 specimens
- Arandis3 specimens
- Namibia2 specimens
- Brandberg Area2 specimens
Guides
All guides
Guide
Jeremejevite from Erongo Mountains, Namibia
Jeremejevite - blue hexagonal prisms from Namibia’s Erongo Mountains; a rare, pleochroic borate with color zoning and terminations prized by collectors.Read guide
Guide
Jeremejevite from Ameib Farm 60, Namibia
Jeremejevite from Ameib Farm 60, Namibia: blue-to-colorless, slender hexagonal prisms with glassy luster from a key Erongo locality that fascinates collectors.Read guideAbout Jeremejevite
Notable localities include Namibia and Myanmar, where Jeremejevite crystals have been recovered in high-quality crystal groups and well-formed crystals. The Namibian occurrences, especially from the Añiab mine and other desert-hosted pockets, have produced some of the brightest and most pristine examples, while Myanmar specimens are valued for their compact habit and fine termination. Collectors prize Jeremejevite for its rarity, crystal clarity, and the striking elongation of its prisms, which makes it stand out in mineral cabinets.
Collectors seek Jeremejevite for its rarity and aesthetic appeal, as well as the challenge of obtaining truly gemmy, undamaged crystals. Even small, well-formed pieces can display impressive optic quality and surface luster, contributing to display value and scientific interest alike.
