5.4" Rosasite, Selenite and Ferroan Dolomite Association - Morocco

 
This colorful specimen contains green rosasite crystals that formed from a bed of pristine, reddish brown ferroan dolomite. Small translucent selenite crystals can be primarily found along one edge of the specimen, enshrouding small rosasite crystal formations.

Comes with an acrylic display stand.

Rosasite is a secondary mineral that forms in oxidation zones of copper-zinc deposits, generally forming a fibrous botryoidal sphere that can appear vitreous and silky. While typically featuring a blue-green color, colorless specimens are not unheard of. The chemical formula of rosasite is CuZnCO3(OH)2.

Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate—CaMg(CO3)2.

The mineral dolomite crystallizes in the trigonal-rhombohedral system. It forms white, tan, gray, or pink crystals. Dolomite is a double carbonate, having an alternating structural arrangement of calcium and magnesium ions. It does not rapidly dissolve in dilute hydrochloric acid as calcite does. Crystal twinning is common.

The mineral dolomite was first described by Carl Linnaeus in 1768 and In 1791, it was described as a rock by the French naturalist and geologist Déodat Gratet de Dolomieu who first recognized the material in buildings of the old city of Rome, and later as samples collected in the mountains known as the Dolomite Alps of northern Italy.
DETAILS
SPECIES
Rosasite, Gypsum var. Selenite & Dolomite
LOCATION
Bou Bekker, Touissit, Morocco
SIZE
5.4" long, 4" wide
SUB CATEGORY
ITEM
#98935