Lunijianlaite is a rare lithium-bearing clay mineral first described from the Lunijian deposit in China. It typically occurs as fine-grained, earthy to clay-like masses associated with hydrothermal alteration processes.

Hardness

2-3

Mohs

Luster

Pearly

Streak

White

Transparency

Translucent

mineralrareClay Mineral Group family

Lunijianlaite

Hardness: 2-3
Luster: Pearly
Streak: White
Transparency: Translucent

No image

Is this lunijianlaite?

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 lunijianlaite with a known reference. Lunijianlaite sits at Mohs 2-3, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Lunijianlaite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Lunijianlaite typically shows a pearly luster.
4
Match the color range
Compare against the expected color range: white, gray, pale yellow.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: fine-grained aggregates.

Often confused with

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

mineral

Montmorillonite

Mohs 1-2

How to tell apart: Luster reads pearly on Lunijianlaite and dull on Montmorillonite.

How to tell apart: Luster reads pearly on Lunijianlaite and dull on Kaolinite.

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Often found alongside lunijianlaite

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

All properties

Chemical formula: (Li,Al)₄Si₄O₁₀(OH)₂·nH₂O
Mohs hardness: 2-3
Density: 2.5-2.6 g/cm³
Colors: White Gray Pale Yellow
Streak: White
Luster: Pearly
Transparency: Translucent
Crystal system: Monoclinic
Crystal habit: Fine-grained Aggregates
Cleavage: Perfect Basal
Rarity: Rare
Uses: Collector, Scientific Research
Host rock: Hydrothermal Alteration Zones
Typical price: $20-100 per specimen

Where rockhounds find lunijianlaite

Classic worldwide localities

Lunijian, China

Field-hunting tip

Look in hydrothermal alteration zones country, the host setting where lunijianlaite typically forms. If you start seeing quartz, feldspar, mica in float, you are in the right ground. Field specimens usually show a fine-grained aggregates habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify lunijianlaite?+

Mohs hardness is 2-3. It typically shows a pearly luster. The streak is white. Common colors include white, gray, pale yellow.

Where is lunijianlaite found?+

Notable localities include Lunijian, China.

How much is lunijianlaite 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 lunijianlaite?+

Lunijianlaite is most often confused with Montmorillonite, Illite, Kaolinite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with lunijianlaite?+

Lunijianlaite commonly co-occurs with Quartz, Feldspar, Mica. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does lunijianlaite form in?+

Lunijianlaite typically forms in hydrothermal alteration zones. Working float back to the host body is the standard way to chase a fresh occurrence.

What is lunijianlaite used for?+

Lunijianlaite is used in collector, scientific research.

Find lunijianlaite on the map

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