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.

Hardness

5-6

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrareMayenite Supergroup family

Chlorkyuygenite

Hardness: 5-6
Luster: Vitreous
Streak: White
Transparency: Transparent

No image

Is this chlorkyuygenite?

5-step field check

Run through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.

1
Test the hardness
Try to scratch chlorkyuygenite with a known reference. Chlorkyuygenite sits at Mohs 5-6, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Chlorkyuygenite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Chlorkyuygenite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: yellow, brown.
5
Look at form & habit
Crystal 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
Colors: Yellow Brown
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, 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

How do you identify chlorkyuygenite?+

Mohs hardness is 5-6. It typically shows a vitreous luster. The streak is white. Common colors include yellow, brown.

Where is chlorkyuygenite found?+

Notable localities include Hatrurim Formation, Israel; Jordansmuhl, Poland.

How much is chlorkyuygenite worth?+

Typical asking prices fall in the range of $50-300 per micro-mount specimen. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like chlorkyuygenite?+

Chlorkyuygenite is most often confused with Wadalite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with chlorkyuygenite?+

Chlorkyuygenite commonly co-occurs with Gehlenite, Rankinite, Larnite, Brownmillerite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does chlorkyuygenite form in?+

Chlorkyuygenite typically forms in pyrometamorphic rocks. Working float back to the host body is the standard way to chase a fresh occurrence.

What is chlorkyuygenite used for?+

Chlorkyuygenite is used in collector.

Find chlorkyuygenite on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.