How do I identify Pinnoite?

Pinnoite can be identified by its hardness of 3.5 on the Mohs scale, Yellow to yellow-green; yellow in transmitted light color. Look for these key characteristics when examining specimens.

What color is Pinnoite?

Pinnoite typically appears in Yellow to yellow-green; yellow in transmitted light. Color can vary depending on impurities and formation conditions.

How hard is Pinnoite?

Pinnoite has a hardness of 3.5 on the Mohs scale. This gives it moderate hardness.

How to Identify Pinnoite | Properties, Meaning & Uses

What is Pinnoite?

Pinnoite is a magnesium borate mineral with formula: MgB2O(OH)6 or MgB2O4·3(H2O). 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, Germany and named for the mine counselor Oberbergrat Pinno of Halle, Germany. It occurs in marine evaporite deposits and as efflorescence associated with mineral springs. It occurs with boracite and kaliborite. It also occurs in the borax mines of Death Valley in California, the Da Quidam saline lake of the Qinghai-Xizang Plateau in Tibet and in Socacastro, Salta Province, Argentina.

Pinnoite Market Value Calculator

Estimate the market value of Pinnoite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Pinnoite Localities Map

See where Pinnoite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.