Uklonskovite is a rare sodium magnesium sulfate fluoride mineral found primarily in evaporite deposits. It typically forms clear, tabular crystals or fine-grained aggregates and is highly sought after by mineral collectors for its unique chemistry and rarity.

Hardness

2.5

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrare

Uklonskovite

Hardness: 2.5
Luster: Vitreous
Streak: White
Transparency: Transparent

No image

Is this uklonskovite?

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 uklonskovite with a known reference. Uklonskovite sits at Mohs 2.5, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Uklonskovite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Uklonskovite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: white, colorless.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: tabular crystals, aggregates.

Often confused with

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

Often found alongside uklonskovite

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

All properties

Chemical formula: NaMg(SO₄)F·2H₂O
Mohs hardness: 2.5
Density: 2.33 g/cm³
Colors: White Colorless
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Monoclinic
Crystal habit: Tabular Crystals, Aggregates
Cleavage: Perfect
Rarity: Rare
Uses: Collector
Host rock: Evaporite Deposits
Typical price: $50-300 per specimen

Where rockhounds find uklonskovite

Classic worldwide localities

Inder Deposit, Kazakhstan

Field-hunting tip

Look in evaporite deposits country, the host setting where uklonskovite typically forms. If you start seeing borax, glauberite, halite in float, you are in the right ground. Field specimens usually show a tabular crystals, aggregates habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify uklonskovite?+

Mohs hardness is 2.5. It typically shows a vitreous luster. The streak is white. Common colors include white, colorless.

Where is uklonskovite found?+

Notable localities include Inder Deposit, Kazakhstan.

How much is uklonskovite worth?+

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

What rocks look like uklonskovite?+

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

What minerals are found with uklonskovite?+

Uklonskovite commonly co-occurs with borax, glauberite, halite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does uklonskovite form in?+

Uklonskovite typically forms in evaporite deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is uklonskovite used for?+

Uklonskovite is used in collector.

Find uklonskovite on the map

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