Minerals identify

Know how to recognize them

Pinnoite

Borate mineral

Pinnoite is a magnesium with formula: MgB2O(OH)6 It crystallizes in the tetragonal crystal system and occurs as colorless to yellow or light green radial fibrous clusters and rarely as short prismatic crystals.

Pinnoite was first described in 1884 for an occurrence in the Stassfurt potash deposit, Saxony-Anhalt and named for the mine counselor Oberbergrat Pinno of Halle It occurs in marine evaporite associated with mineral springs. It occurs with boracite and kaliborite It also occurs in the borax mines of Death Valley , the Da Quidam saline lake of the Qinghai-Xizang Plateau in Tibet, Argentina

Identification

Color of mineral

Yellow
Green

Mohs scale ( mineral hardness )

3.5

Density ( specific gravity )

1.565
1.575

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Tetragonal