Jeremejevite is a highly sought-after rare borate mineral known for its striking, well-formed prismatic crystals, often found with a distinct blue hue. It typically occurs in granite pegmatites and is prized by collectors for its clarity and geometric perfection. Fine specimens from Namibia are considered among the world's most beautiful and valuable mineral collectibles.
Is this jeremejevite?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch jeremejevite with a known reference. Jeremejevite sits at Mohs 6.5-7 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Jeremejevite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Jeremejevite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: colorless, pale blue, yellow, white.
- 5Look at form & habitCrystal system: hexagonal. Typical habit: prismatic crystals.
Often confused with
Jeremejevite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside jeremejevite
Minerals reported to co-occur with jeremejevite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Al₆B₅F₃O₁₅(OH)₃
- Mohs hardness
- 6.5-7
- Density
- 3.28-3.31 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Hexagonal
- Crystal habit
- Prismatic Crystals
- Cleavage
- Distinct On {0001}
- Rarity
- Rare
- Uses
- Collector, Gemstone
- Host rock
- Granite Pegmatites
- Typical price
- $200-2000 per carat for gem quality
Where rockhounds find jeremejevite
Classic worldwide localities
- Erongo Mountains, Namibia
- Adun-Cholon, Russia
- Eifel Mountains, Germany
- Tadjikistan
Field-hunting tip
Look in granite pegmatites country — that is the host setting where jeremejevite typically forms. If you start seeing albite, tourmaline, quartz in float, you are in the right ground. Field specimens usually show a prismatic crystals habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find jeremejevite on the map
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