Kurchatovite is a relatively uncommon calcium magnesium borate mineral typically found in skarn deposits. It often occurs as fine-grained, massive material or small prismatic crystals and is primarily sought after by systematic mineral collectors.

Hardness

4.5

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrareBorate Group family

Kurchatovite

Hardness: 4.5
Luster: Vitreous
Streak: White
Transparency: Transparent

Is this kurchatovite?

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 kurchatovite with a known reference. Kurchatovite sits at Mohs 4.5, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Kurchatovite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Kurchatovite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: white, colorless, gray.
5
Look at form & habit
Crystal system: orthorhombic. Typical habit: granular, massive, prismatic crystals.

Often confused with

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

mineral

Suanite

Mohs 5.5

How to tell apart: Suanite is the harder of the two (Mohs 5.5 vs. 4.5).

How to tell apart: Luster reads vitreous on Kurchatovite and dull on Szaibelyite.

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Often found alongside kurchatovite

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

All properties

Chemical formula: CaMgB₂O₅
Mohs hardness: 4.5
Density: 3.36 g/cm³
Colors: White Colorless Gray
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Orthorhombic
Crystal habit: Granular, Massive, Prismatic Crystals
Cleavage: None
Rarity: Rare
Uses: Collector
Host rock: Contact Metamorphosed Magnesian Skarns
Typical price: $20-100 per specimen

Where rockhounds find kurchatovite

Classic worldwide localities

Sakha Republic, Russia
Kyzyl-Tas, Russia

Field-hunting tip

Look in contact metamorphosed magnesian skarns country, the host setting where kurchatovite typically forms. If you start seeing suanite, szaibelyite, ludwigite in float, you are in the right ground. Field specimens usually show a granular, massive, prismatic crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify kurchatovite?+

Mohs hardness is 4.5. It typically shows a vitreous luster. The streak is white. Common colors include white, colorless, gray.

Where is kurchatovite found?+

Notable localities include Sakha Republic, Russia; Kyzyl-Tas, Russia.

How much is kurchatovite worth?+

Typical asking prices fall in the range of $20-100 per specimen. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like kurchatovite?+

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

What minerals are found with kurchatovite?+

Kurchatovite commonly co-occurs with Suanite, Szaibelyite, Ludwigite, Calcite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does kurchatovite form in?+

Kurchatovite typically forms in contact metamorphosed magnesian skarns. Working float back to the host body is the standard way to chase a fresh occurrence.

What is kurchatovite used for?+

Kurchatovite is used in collector.

Find kurchatovite on the map

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