Khibinskite is a rare potassium zirconium silicate discovered in the alkaline massifs of the Kola Peninsula. It typically occurs as small, tabular crystals within nepheline syenites and is highly prized by mineralogists specializing in rare alkaline minerals.

Hardness

4.5-5.5

Mohs

Luster

Dull or greasy

Streak

White

Transparency

Translucent

mineralrare

Khibinskite

Hardness: 4.5-5.5
Luster: Dull or greasy
Streak: White
Transparency: Translucent

No image

Is this khibinskite?

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 khibinskite with a known reference. Khibinskite sits at Mohs 4.5-5.5, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Streak: white.
3
Read the luster
Hold the specimen under a strong light. Luster: dull or greasy.
4
Match the color range
Compare against the expected color range: colorless, white, light yellow.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: inclusions, stellate.

Often confused with

Khibinskite vs. its common look-alikes, and how to tell them apart in the field.

mineral

Eudialyte

Mohs 5-6

How to tell apart: Luster reads dull or greasy on Khibinskite and vitreous to dull on Eudialyte.

How to tell apart: Luster reads dull or greasy on Khibinskite and adamantine on Wadeite.

Compare →

Often found alongside khibinskite

Minerals reported to co-occur with khibinskite. Spotting these in float or country rock is a strong cue you are in the right ground.

All properties

Chemical formula: K₂ZrSi₂O₇
Mohs hardness: 4.5-5.5
Density: 3.40 g/cm³
Colors: Colorless White Light yellow
Streak: White
Luster: Dull or greasy
Transparency: Translucent
Crystal system: Monoclinic
Crystal habit: Inclusions, stellate
Cleavage: Perfect on {001}; perfect on {100}; perfect on {111}
Rarity: Rare
Uses: Collector
Host rock: In aegirine-rich metasomatic rocks in a differentiated alkalic massif

Where rockhounds find khibinskite

Classic worldwide localities

Khibiny massif, in the Hackmann Valley, Kola Peninsula, Russia

Field-hunting tip

Where it forms: In aegirine-rich metasomatic rocks in a differentiated alkalic massif. If you start seeing eudialyte, zircon in float, you are in the right ground. Typical habit: inclusions, stellate. Train your eye for that shape before scanning the outcrop.

Common questions

How do you identify khibinskite?+

Mohs hardness is 4.5-5.5. Luster: dull or greasy. The streak is white. Common colors include colorless, white, light yellow.

Where is khibinskite found?+

Notable localities include Khibiny massif, in the Hackmann Valley, Kola Peninsula, Russia.

What rocks look like khibinskite?+

Khibinskite is most often confused with Eudialyte, Wadeite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with khibinskite?+

Khibinskite commonly co-occurs with Eudialyte, Zircon. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does khibinskite form in?+

Where it forms: In aegirine-rich metasomatic rocks in a differentiated alkalic massif. Working float back to the host body is the standard way to chase a fresh occurrence.

What is khibinskite used for?+

Khibinskite is used in collector.

Find khibinskite on the map

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