Chlorkyuygenite is a rare member of the mayenite supergroup found in high-temperature, low-pressure pyrometamorphic environments. Collectors typically find it as small, yellow to brown cubic grains associated with other calcium-aluminate minerals in calc-silicate xenoliths.
Is this chlorkyuygenite?
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 chlorkyuygenite with a known reference. Chlorkyuygenite sits at Mohs 5-6 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Chlorkyuygenite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Chlorkyuygenite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: yellow, brown.
- 5Look at form & habitCrystal system: cubic. Typical habit: equant crystals, granular.
Often confused with
Chlorkyuygenite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside chlorkyuygenite
Minerals reported to co-occur with chlorkyuygenite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Ca₁₂Al₁₄O₃₂Cl₂
- Mohs hardness
- 5-6
- Density
- 2.89 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Cubic
- Crystal habit
- Equant Crystals, Granular
- Cleavage
- None
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Pyrometamorphic Rocks
- Typical price
- $50-300 per micro-mount specimen
Where rockhounds find chlorkyuygenite
Classic worldwide localities
- Hatrurim Formation, Israel
- Jordansmuhl, Poland
Field-hunting tip
Look in pyrometamorphic rocks country — that is the host setting where chlorkyuygenite typically forms. If you start seeing gehlenite, rankinite, larnite in float, you are in the right ground. Field specimens usually show a equant crystals, granular habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find chlorkyuygenite on the map
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