Gahnite

Gahnite
Gahniet, Gahnit, Gahnita, Ганит, 鋅類晶石

Commonly known rarer (so called collectors stones) very rare (rarities) relatively rare organic material

Formula: ZnAl₂O₄
Mineral class: oxides
Crystal system: cubic
Mohs scale: 7.5 - 8
Density (g/cm³): 4.62
Cleavage: indistinct
Colors: yellow, dark green, brown, black
Luster: vitreous
Fluorescence: -
Pleochroism: -
Largest Gahnite: 12.5 cm (Sterling Hill / New Jersey / USA)
Deposits: worldwide
1st Description: 1892

Gahnite Mineral

Size: 2.3 x 2.2 x 1.7 cm

Origin: Franklin / Sussex County / New Jersey / USA

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Gahnite

Weight: 0.65 ct

Origin: Brazil

Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji.