Brochantita
Brochantita is a mineral with formula Cu₄SO₄(OH)₆, in the Sulfatos group. This specimen comes from Bou Azzer, Bou Azzer, Uarzazat, Marruecos.
Description
Piece with a cavity lined by dark green brochantite microcrystals with a velvety texture, and a small side area covered with electric-blue quartzified chrysocolla, with a vitreous luster from a microcrystalline quartz coating.
About Brochantita
Representative sample of secondary copper alteration in an oxidized environment. The brochantite has a fibrous appearance without defined crystals, while the quartzified chrysocolla forms a very aesthetic cavity, stable and with great contrast.
Technical data
- Catalogue No.
- 0416
- Composition
- Cu₄SO₄(OH)₆
- Name
- Brochantita
- Group
- Sulfatos
- Category
- Cavella
- Associations
- Crisocola
- Mine
- Bou Azzer
- District / Municipality
- Bou Azzer
- Province
- Uarzazat
- Country
- Marruecos
- Size (cm)
- 7 x 7 x 4
- Weight
- 155 g
- Ex-collection
- Daniel C
- Etymology
- Named after André-Jean-François-Marie Brochant de Villiers (1772-1840).
- Quality
- Buena
- Value trend
- Estable
Related specimens
- Barita — España
- Barita — Italia
- Barita (Amarilla) — Italia
- Celestina — Madagascar
- Goethita (Botroidal) — Marruecos
- Malaquita (Fibrosa) — Marruecos
- Yeso (Lapis Specularis) — España
- Vanadinita — Marruecos