Roselite is a rare arsenate mineral with chemical formula: Ca 2 (Co,Mg)[AsO 4] 2 ·H 2 O. It was first described in 1825 for an occurrence in the Rappold mines of Schneeberg, Saxony, Germany and named by Armand Lévy after German mineralogist Gustav Rose. [2]

Roselite Group. Roselite-Wendwilsonite Series. The monoclinc dimorph of anorthoroselite (triclinic). The cobalt analogue of wendwilsonite.

Mineral Group: Roselite group. Occurrence: A rare secondary mineral in cobalt-bearing hydrothermal mineral deposits. Association: Talmessite (Bou Azzer, Morocco).

Roselite is a popular, although scarce, collection mineral. Its color and small, complex crystals are attractive and make roselite a nice thumbnail mineral. Roselite is in a solid solution series with the mineral wendwilsonite, (Hydrated Calcium Magnesium Cobalt Arsenate).

Isolated crystals of magnesian Roselite. They are translucent, very well defined, have a very intense, deep and uniform color and are on matrix with Dolomite, Calcite, dark spheroidal aggregates of cuprian Cobaltaustinite and small isolated crystals of Cobaltlotharmeyerite.

Roselite (sometimes called alpha-roselite to distinguish it from its triclinic dimorph, beta-roselite) is a rare cobalt arsenate from the oxidation zone of cobalt arsenide deposits. Roselite owes its name to the mineralogist Gustave Rose of the University of Berlin.

Roselite. Comments: Gemmy crystals of roselite. Location: Bou Azzer, Anti-Atlas Mts., Morocco. Scale: Crystal size 3 mm. © John Veevaert

Roselite is a secondary mineral that can be found in cobalt-rich hydrothermal deposits at localities including Germany, Bou Azzer, Morocco, and Spain, among other localities. Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/roselite.pdf.

4 天之前 · The dense coverage of roselite essentially covers the entire front of the elongate triangular piece of matrix and the crystals display prominently. Roselite is a hydrated calcium-cobalt arsenate and is the cobalt analogue of wendwilsonite; the two often occur together and may do so on this piece.

The meaning of ROSELITE is a mineral (CaCoMg)3 (AsO4)2.2H2O consisting of a rose-red arsenate of calcium, cobalt, and manganese in small triclinic crystals.