Fluoro-leakeite is an extremely rare member of the amphibole supergroup, characterized by its striking deep blue color. Collectors typically find it as small, elongated prismatic crystals within complex alkaline intrusive complexes or pegmatites.
Is this fluoro-leakeite?
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 fluoro-leakeite with a known reference. Fluoro-leakeite sits at Mohs 6 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Fluoro-leakeite leaves a pale blue streak.
- 3Read the lusterHold the specimen under a strong light. Fluoro-leakeite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: deep blue, violet-blue, dark blue.
- 5Look at form & habitCrystal system: monoclinic. Typical habit: prismatic crystals.
Often confused with
Fluoro-leakeite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside fluoro-leakeite
Minerals reported to co-occur with fluoro-leakeite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- NaNa₂(Mg₂Fe³⁺₂Li)Si₈O₂₂(F,OH)₂
- Mohs hardness
- 6
- Density
- 3.16 g/cm³
- Streak
- Pale Blue
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Monoclinic
- Crystal habit
- Prismatic Crystals
- Cleavage
- Perfect On {110}
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Agpaitic Pegmatites and Alkaline Igneous Rocks
- Typical price
- $50-300 per specimen
Where rockhounds find fluoro-leakeite
Classic worldwide localities
- Norra Kärr, Sweden
- Kokchetav Massif, Kazakhstan
Field-hunting tip
Look in agpaitic pegmatites and alkaline igneous rocks country — that is the host setting where fluoro-leakeite typically forms. If you start seeing aegirine, microcline, nepheline 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
How do you identify fluoro-leakeite?+
Where is fluoro-leakeite found?+
How much is fluoro-leakeite worth?+
What rocks look like fluoro-leakeite?+
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Find fluoro-leakeite on the map
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