Formula: Mg₃B₇O₁₃Cl
Mineral class: borates
Crystal system: orthorhombic
Mohs scale: 7 - 7.5
Density (g/cm³): 2.9 - 3
Cleavage: -
Colors: colorless, white, grey, yellow, brown, light blue, greenish
Luster: vitreous - adamantine
Fluorescence: -
Pleochroism: -
Largest Boracite: 2.5 cm?
Deposits: Australia, Bolivia, Canada, Colombia, France, Germany, Kazakhstan, Poland, England, USA
1st Description: 1951

Boracite Mineral

Origin: Harz Mountains / Germany

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

Boracite Mineral

Origin: Kalkberg / Lüneburg / Germany

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

Boracite Mineral

Origin: Boulby Mine / Loftus / Cleveland / Great Britain

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

Boracite Mineral

Origin: Boulby Mine / Loftus / Cleveland / Great Britain

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