Erythrite

Erythrite

Erythrite, also known as cobalt bloom, is a mineral belonging to the arsenate mineral group. It is named after the Greek word "erythros," meaning red, due to its vibrant pink to purple-red coloration. Erythrite is valued for its aesthetic appeal and is often used as a collector's mineral.

Physical Properties

Erythrite has a monoclinic crystal system and typically forms as prismatic or acicular crystals. It has a hardness of 1.5 to 2.5 on the Mohs scale, making it a relatively soft mineral. Erythrite has a specific gravity of 3.0 to 3.3 and exhibits a perfect cleavage in one direction. Its luster is vitreous to sub-metallic, and it is translucent to transparent.

Occurrence

Erythrite is commonly found in oxidized cobalt and nickel deposits. It occurs as a secondary mineral in association with other arsenate minerals, such as annabergite and pharmacosiderite. Erythrite is often found in the form of crusts, botryoidal masses, or as coatings on other minerals. Notable localities for erythrite include Germany, Morocco, Chile, and the Democratic Republic of Congo.

Uses

Erythrite is primarily valued for its aesthetic qualities and is sought after by mineral collectors. Its vibrant color and unique crystal formations make it a desirable addition to mineral collections. Erythrite is also occasionally used as a minor ore of cobalt, although its economic significance in this regard is limited.

Health and Safety

Erythrite contains arsenic, which is a toxic element. Therefore, it is important to handle erythrite specimens with caution and avoid inhaling or ingesting its dust or fragments. It is recommended to wash hands thoroughly after handling erythrite and to store it in a secure location away from children and pets.

See Also

• Cobalt
• Mineral Collecting
• Arsenate Minerals