Torbernite

A variety of Autunite Group

Rare
Torbernite specimen - rock identification

What is Torbernite?

Upon glancing at torbernite, it looks like an innocent gemstone, but under further scrutiny, you will find it is riddled with uranium! This mineral is considered radioactive, so collecting these requires special handling and storage containers to avoid health-related issues. When not kept sealed, it can lose hydration and morph into different minerals.

Uses & Applications

Torbernite is a valuable ore of uranium and is often an indicator of uranium deposits. However, it is primarily used in mineral collections. Use caution when handling specimens of torbernite or using it in any application, as it is radioactive.

Torbernite Market Value Calculator

Estimate the market value of Torbernite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Preview only. Full pricing comps and valuation report in the app.

Torbernite Localities Map

See where Torbernite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview
North ZoneCentral RidgeSouth Basin

Interactive map layers and collecting notes are available in the app.

Key Characteristics

Characteristics of Torbernite

The most obvious factor in identifying torbernite is its radioactivity. However, since it is frequently found in association with other radioactive minerals, this may not be useful in separating one uranium mineral from the rest. A next step would be to check color. Most uranium-bearing minerals are bright yellow or green. As torbernite is exclusively green, this can be a useful secondary fact. Crystal habit is also useful, but as it shares a similar structure and color with autunite. Nonetheless, regardless of identification, it is likely that at least some of the specimen will have already altered to meta-torbernite.

Health & Safety Information

  • ⚠️Harm Reason: Torbernite is toxic due to its Radioactivity.
  • ⚠️Radioactivity: Torbernite contains radioactive uranium. Radioactivity should be assessed using a Geiger counter before handling. Inhalation of the dust, or keep them by your side for a long time will be hazardous. Keep them in a closed box and in an well-ventilated place. Wash your hand after handling them.
  • ⚠️How to prevent the risks of Torbernite?

More Images

Torbernite specimen 2
© Michel Poullaouec
Torbernite specimen 3
© Didier Descouens

Quick Facts

Physical Properties

Color
Emerald-green, grass-green. leek green, siskin green, apple green
Hardness (Mohs)
2 - 2.5
Density
3.22 g/cm³
Streak
Pale green
Luster
Pearly, Vitreous, Waxy, Sub-adamantine
Crystal System
Tetragonal

Chemical Properties

Chemical Formula
Cu(UO2)2(PO4)2 · 12H2O
Elements
Cu, H, O, P, U

Also Known As

TorberniteChalkoliteCuprouraniteTorberite
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