Paratsepinite-Ba is a rare member of the complex labuntsovite group of minerals, typically found in alkaline igneous environments. It occurs as small, glassy prismatic crystals that are challenging to distinguish from other group members without analytical testing.

Hardness

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrareLabuntsovite Group family

Paratsepinite-Ba

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

No image

Is this paratsepinite-ba?

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 paratsepinite-ba with a known reference. Paratsepinite-Ba sits at Mohs 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: vitreous.
4
Match the color range
Compare against the expected color range: brown.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: aggregates, prismatic.

Often confused with

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

mineral

Labuntsovite

Mohs 6

How to tell apart: Labuntsovite is the harder of the two (Mohs 6 vs. 5); luster reads vitreous on Paratsepinite-Ba and greasy on Labuntsovite.

Often found alongside paratsepinite-ba

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

All properties

Chemical formula: (Ba,K,Na)₂(Ti,Nb)₄(Si₄O₁₂)₂(OH,O)₄·5H₂O
Mohs hardness: 5
Density: 2.88 g/cm³
Colors: Brown
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Monoclinic
Crystal habit: Aggregates, prismatic
Cleavage: Imperfect
Rarity: Rare
Uses: Collector
Host rock: In cavities formed by hydrothermal alteration of alkaline pegmatite

Where rockhounds find paratsepinite-ba

Classic worldwide localities

Mt. Lepkhe-Nelm, Lovozero alkaline massif, Kola Peninsula, Russia

Field-hunting tip

Where it forms: In cavities formed by hydrothermal alteration of alkaline pegmatite. If you start seeing titanite, aegirine, eudialyte in float, you are in the right ground. Typical habit: aggregates, prismatic. Train your eye for that shape before scanning the outcrop.

Common questions

How do you identify paratsepinite-ba?+

Mohs hardness is 5. Luster: vitreous. The streak is white. Common colors include brown.

Where is paratsepinite-ba found?+

Notable localities include Mt. Lepkhe-Nelm, Lovozero alkaline massif, Kola Peninsula, Russia.

What rocks look like paratsepinite-ba?+

Paratsepinite-Ba is most often confused with Labuntsovite, Nenadkevichite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with paratsepinite-ba?+

Paratsepinite-Ba commonly co-occurs with Titanite, Aegirine, Eudialyte, Lamprophyllite, Lorenzenite, Natrolite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does paratsepinite-ba form in?+

Where it forms: In cavities formed by hydrothermal alteration of alkaline pegmatite. Working float back to the host body is the standard way to chase a fresh occurrence.

What is paratsepinite-ba used for?+

Paratsepinite-Ba is used in collector.

Find paratsepinite-ba on the map

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