Hydroxykenoelsmoreite is a rare member of the pyrochlore supergroup featuring a vacancy-dominant structure. Collectors typically look for its distinct octahedral habit in granitic pegmatites, where it occurs as a primary or secondary tungsten-bearing mineral.
Is this hydroxykenoelsmoreite?
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 hydroxykenoelsmoreite with a known reference. Hydroxykenoelsmoreite sits at Mohs 5-5.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Hydroxykenoelsmoreite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Hydroxykenoelsmoreite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: yellow, brown, colorless.
- 5Look at form & habitCrystal system: cubic. Typical habit: octahedral crystals.
Often found alongside hydroxykenoelsmoreite
Minerals reported to co-occur with hydroxykenoelsmoreite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- W₂◻₂O₆(OH)
- Mohs hardness
- 5-5.5
- Density
- 4.5-5.2 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Cubic
- Crystal habit
- Octahedral Crystals
- Cleavage
- None
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Granitic Pegmatites
- Typical price
- $50-300 per specimen
Where rockhounds find hydroxykenoelsmoreite
Classic worldwide localities
- Sweden
- Czech Republic
- Russia
Field-hunting tip
Look in granitic pegmatites country — that is the host setting where hydroxykenoelsmoreite typically forms. If you start seeing quartz, feldspar, mica in float, you are in the right ground. Field specimens usually show a octahedral crystals habit, so train your eye for that shape before scanning the outcrop.



