Minerals identify

Know how to recognize them

Cuprite

Oxide mineral

Cuprite is an oxide mineral composed of copper(I) oxide

Its dark crystals with red internal reflections are in the isometric system hexoctahedral class, appearing as cubic, octahedral, or dodecahedral forms, or in combinations. Penetration twins frequently occur. In spite of its nice color it is rarely used for jewelry of 3.5 to 4. It has a relatively high specific gravity of 6.1, imperfect cleavage and is brittle to conchoidal fracture. The luster is sub-metallic to brilliant adamantine. The "chalcotrichite" (from Ancient Greek variety typically shows greatly elongated (parallel to) capillary or needle like crystals forms.

It is a secondary mineral which forms in the oxidized zone of copper sulfide deposits. It frequently occurs in association with native copper, malachite minerals. It is known as ruby copper due to its distinctive red color.

Cuprite was first described by Wilhelm Karl Ritter von Haidinger in 1845 and the name derives from the Latin

Cuprite is found in the Ural Mountains , Altai Mountains, and in more isolated locations in Cornwall , Chile

Identification

Color of mineral

Red
Black

Mohs scale ( mineral hardness )

3.5

The streak

Red
Brown

Density ( specific gravity )

2.849

Luster ( interacts light )

Adamantine
Metallic

Crystal ( diaphaneity )

Cubic