Khanneshite is a rare carbonate mineral discovered in the Khanneshin carbonatite complex of Afghanistan. It typically forms as prismatic to acicular crystals and is primarily sought after by advanced mineral collectors specializing in rare carbonatite species.

Hardness

3-4

Mohs

Luster

Vitreous

Streak

White

Transparency

Semitransparent

mineralrareDawsonite Group family

Khanneshite

Hardness: 3-4
Luster: Vitreous
Streak: White
Transparency: Semitransparent

Is this khanneshite?

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 khanneshite with a known reference. Khanneshite sits at Mohs 3-4, 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: vitreous.
4
Match the color range
Compare against the expected color range: light yellow.
5
Look at form & habit
Crystal system: hexagonal. Typical habit: prismatic crystals.

Often confused with

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

Often found alongside khanneshite

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

All properties

Chemical formula: (Na,Ca)₃(Ba,Sr,Ce,Ca)₃(CO₃)₅
Mohs hardness: 3-4
Density: 3.8-3.9 g/cm³
Colors: Light yellow
Streak: White
Luster: Vitreous
Transparency: Semitransparent
Crystal system: Hexagonal
Crystal habit: Prismatic crystals
Cleavage: One, parallel elongation, indistinct; and a transverse parting
Rarity: Rare
Uses: Collector
Host rock: Disseminated in hydrothermally-altered fine-grained carbonatite (Khanneshin complex, Afghanistan); in a drillcore in a carbonatite veinlet from a differentiated alkalic massif (Khibiny massif, Kola Peninsula, Russia)

Where rockhounds find khanneshite

Classic worldwide localities

Khanneshin carbonatite complex, Afghanistan
Tuliylukht Bay, Khibiny massif, Kola Peninsula, Russia

Field-hunting tip

Where it forms: Disseminated in hydrothermally-altered fine-grained carbonatite (Khanneshin complex, Afghanistan); in a drillcore in a carbonatite veinlet from a differentiated alkalic massif (Khibiny massif, Kola Peninsula, Russia). If you start seeing dolomite, calkinsite-, carbocernaite in float, you are in the right ground. Typical habit: prismatic crystals. Train your eye for that shape before scanning the outcrop.

Common questions

How do you identify khanneshite?+

Mohs hardness is 3-4. Luster: vitreous. The streak is white. Common colors include light yellow.

Where is khanneshite found?+

Notable localities include Khanneshin carbonatite complex, Afghanistan; Tuliylukht Bay, Khibiny massif, Kola Peninsula, Russia.

What rocks look like khanneshite?+

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

What minerals are found with khanneshite?+

Khanneshite commonly co-occurs with Dolomite, Calkinsite-, Carbocernaite, Mckelveyite, Barite, Chlorite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does khanneshite form in?+

Where it forms: Disseminated in hydrothermally-altered fine-grained carbonatite (Khanneshin complex, Afghanistan); in a drillcore in a carbonatite veinlet from a differentiated alkalic massif (Khibiny massif, Kola Peninsula, Russia). Working float back to the host body is the standard way to chase a fresh occurrence.

What is khanneshite used for?+

Khanneshite is used in collector.

Find khanneshite on the map

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