Schröckingerite is a rare secondary uranium mineral often found as bright yellow, platy or rosette-like aggregates. It is highly prized by collectors for its brilliant yellow-green fluorescence under ultraviolet light. It typically occurs as an efflorescence in oxidized zones of uranium deposits.

Hardness

2.5

Mohs

Luster

Pearly

Streak

Pale Yellow

Transparency

Translucent

mineraluncommon

Schröckingerite

Hardness: 2.5
Luster: Pearly
Streak: Pale Yellow
Transparency: Translucent

Is this schröckingerite?

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 schröckingerite with a known reference. Schröckingerite 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. Schröckingerite leaves a pale yellow streak.
3
Read the luster
Hold the specimen under a strong light. Schröckingerite typically shows a pearly luster.
4
Match the color range
Compare against the expected color range: yellow, greenish yellow.
5
Look at form & habit
Crystal system: triclinic. Typical habit: platy crystals, rosettes, globular aggregates, crusts.

Often confused with

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

How to tell apart: Streak differs — Schröckingerite leaves pale yellow, Uranocircite leaves yellow.

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Often found alongside schröckingerite

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

All properties

Chemical formula: NaCa₃(UO₂)(CO₃)₃(SO₄)F·10H₂O
Mohs hardness: 2.5
Density: 2.5 g/cm³
Colors: Yellow Greenish Yellow
Streak: Pale Yellow
Luster: Pearly
Transparency: Translucent
Crystal system: Triclinic
Crystal habit: Platy Crystals, Rosettes, Globular Aggregates, Crusts
Cleavage: Perfect Basal
Fluorescence: Bright Yellowish-green Under UV Light
Rarity: Uncommon
Uses: Collector, Scientific Research
Host rock: Oxidized Uranium Deposits, Hydrothermal Veins
Typical price: $20-150 for thumbnail to small cabinet specimens

Where rockhounds find schröckingerite

Classic worldwide localities

Jachymov, Czech Republic
Wamsutter, Wyoming, USA
Marysvale, Utah, USA
Schneeberg, Germany

Field-hunting tip

Look in oxidized uranium deposits, hydrothermal veins country — that is the host setting where schröckingerite typically forms. If you start seeing uraninite, gypsum, liebigite in float, you are in the right ground. Field specimens usually show a platy crystals, rosettes, globular aggregates, crusts habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify schröckingerite?+

Mohs hardness is 2.5. It typically shows a pearly luster. The streak is pale yellow. Common colors include yellow, greenish yellow.

Where is schröckingerite found?+

Notable localities include Jachymov, Czech Republic; Wamsutter, Wyoming, USA; Marysvale, Utah, USA; Schneeberg, Germany.

How much is schröckingerite worth?+

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

Is schröckingerite safe to handle?+

This mineral is radioactive. This mineral is radioactive. Handle with care, wash hands thoroughly after contact, store in a sealed lead-lined or dense plastic container, and avoid inhalation of dust. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like schröckingerite?+

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

What minerals are found with schröckingerite?+

Schröckingerite commonly co-occurs with Uraninite, Gypsum, Liebigite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does schröckingerite form in?+

Schröckingerite typically forms in oxidized uranium deposits, hydrothermal veins. Working float back to the host body is the standard way to chase a fresh occurrence.

What is schröckingerite used for?+

Schröckingerite is used in collector, scientific research.

Find schröckingerite on the map

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