Rinneite is a rare potassium-sodium-iron chloride mineral typically found in marine evaporite deposits. It is highly deliquescent and unstable in humid environments, often requiring airtight storage to prevent breakdown into its constituent salts. Collectors prize it for its unique chemical composition and association with other complex evaporite species.

Hardness

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrare

Rinneite

Hardness: 3
Luster: Vitreous
Streak: White
Transparency: Transparent

No image

Is this rinneite?

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 rinneite with a known reference. Rinneite sits at Mohs 3 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Rinneite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Rinneite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: colorless, white, pale pink, pale yellow.
5
Look at form & habit
Crystal system: trigonal. Typical habit: massive, granular, or tabular crystals.

Often confused with

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

How to tell apart: Rinneite is noticeably harder (Mohs 3 vs. 2).

Often found alongside rinneite

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

All properties

Chemical formula: K₃NaFeCl₆
Mohs hardness: 3
Density: 2.35 g/cm³
Colors: Colorless White Pale Pink Pale Yellow
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Trigonal
Crystal habit: Massive, Granular, Or Tabular Crystals
Cleavage: Distinct On {0001}
Rarity: Rare
Uses: Collector, Scientific Research
Host rock: Evaporite Deposits in Salt Mines
Typical price: $20-150 for small specimens

Where rockhounds find rinneite

Classic worldwide localities

Douglashall, Germany
Kalush, Ukraine
Solikamsk, Russia
Carlsbad, USA

Field-hunting tip

Look in evaporite deposits in salt mines country — that is the host setting where rinneite typically forms. If you start seeing halite, sylvite, carnallite in float, you are in the right ground. Field specimens usually show a massive, granular, or tabular crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify rinneite?+

Mohs hardness is 3. It typically shows a vitreous luster. The streak is white. Common colors include colorless, white, pale pink, pale yellow.

Where is rinneite found?+

Notable localities include Douglashall, Germany; Kalush, Ukraine; Solikamsk, Russia; Carlsbad, USA.

How much is rinneite worth?+

Typical asking prices fall in the range of $20-150 for small specimens. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like rinneite?+

Rinneite is most often confused with Halite, Sylvite, Carnallite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with rinneite?+

Rinneite commonly co-occurs with Halite, Sylvite, Carnallite, Kieserite, Anhydrite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does rinneite form in?+

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

What is rinneite used for?+

Rinneite is used in collector, scientific research.

Find rinneite on the map

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