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 6.5-7.5, softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Streak: white.
- 3Read the lusterHold the specimen under a strong light. Luster: vitreous.
- 4Match the color rangeCompare against the expected color range: colorless, white, yellowish white, bluish white.
- 5Look at form & habitCrystal system: hexagonal. Typical habit: crystalline, prismatic.
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
- Al₆(BO₃)₅F₃
- Mohs hardness
- 6.5-7.5
- Density
- 3.29 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Hexagonal
- Crystal habit
- Crystalline, prismatic
- Cleavage
- None
- Rarity
- Rare
- Uses
- Collector, Gemstone
- Host rock
- A rare late hydrothermal mineral formed in granitic pegmatites
Where rockhounds find jeremejevite
Classic worldwide localities
- Mt. Soktui, Nerschinsk district, Adun-Chilon Mountains, Siberia, Russia
- Kukurt massif, Pamir Mountains, Tajikistan
- A prospect near Cape Cross, at Mile 72, about 100 km north of Swakopmund, and from Ameib, Erongo Mountains, Namibia
- Wannerköpfe and Emmelberg, near Üdersdorf, Eifel district, Germany
Field-hunting tip
Where it forms: A rare late hydrothermal mineral formed in granitic pegmatites. If you start seeing albite, tourmaline, quartz in float, you are in the right ground. Typical habit: crystalline, prismatic. Train your eye for that shape before scanning the outcrop.
Common questions
How do you identify jeremejevite?+
Where is jeremejevite found?+
What rocks look like jeremejevite?+
What minerals are found with jeremejevite?+
What kind of rock does jeremejevite form in?+
What is jeremejevite used for?+
Find jeremejevite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
