Oxycalcioromeite is a rare member of the pyrochlore supergroup, typically occurring as small, well-defined octahedral crystals in metamorphic skarn environments. It is highly valued by advanced micromount collectors due to its scarcity and distinct cubic habit, often found associated with manganese-rich minerals.
Is this oxycalcioroméite?
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 oxycalcioroméite with a known reference. Oxycalcioroméite 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. Oxycalcioroméite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Oxycalcioroméite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: yellow, brown, yellow-brown.
- 5Look at form & habitCrystal system: cubic. Typical habit: octahedral crystals.
Often found alongside oxycalcioroméite
Minerals reported to co-occur with oxycalcioroméite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Ca₂Sb₂O₆O
- Mohs hardness
- 5-5.5
- Density
- 4.8-5.3 g/cm³
- Colors
- Streak
- White
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Cubic
- Crystal habit
- Octahedral Crystals
- Cleavage
- None
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Metamorphosed Carbonate Rocks
- Typical price
- $50-300 per specimen
Where rockhounds find oxycalcioroméite
Classic worldwide localities
- Sweden
- Italy
- Switzerland
Field-hunting tip
Look in metamorphosed carbonate rocks country, the host setting where oxycalcioroméite typically forms. If you start seeing calcite, diopside, magnetite 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.
Common questions
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Find oxycalcioroméite on the map
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