Green Arborescent Chalk Druse Crystals Raw Minerals Stones Rocks Collecting

Description

Origin : Italy (Grosseto)

Size : 241 gr - cm 15.5 x 10.5

Green Aborescent Chalk Druse 241 gr - cm 15.5 x 10.5 Crystals Raw Minerals Stones Rocks for Collection, only a piece, as in photo.
Available also Farneto (Emilia) Gypsum and lots of Gypsum Crystals from the Lazio Volcano (Albano), at this link.

Gypsum is a very soft mineral composed of calcium sulphate dihydrate. It is a typical mineral of evaporitic origin, where it is formed by direct precipitation from supersaturated waters.
It is able to grow in colorless or translucent crystals even of considerable size, the object of collecting, of which the most common type is the desert rose.
There are numerous places with gypsum deposits, especially in Germany, France and Italy, but also in Austria, in Polish territory, in Turkmenistan and in various US deposits.
In Italy it is found in small crystals especially in various areas of the north, but also in Carrara, at Mt. Argentario and in almost all the mines of Sicily associated with sulfur.
Lance iron twin crystals come from the Fiorini quarry in Farneto (Italy, Bologna).