Formula: Mg₄Al₆[(O,OH)₂/BO₄(SiO₄)₄]
Mineral class: silicates
Crystal system: rhombic
Mohs scale: 6.5 - 7
Density (g/cm³): 3.28 - 3.35
Cleavage: good
Colors: yellowish, orange-brown, green, green-brown, blue
Luster: vitreous
Fluorescence: -
Pleochroism: strong: green - yellow - brown
Largest Kornerupine: 23 cm (Fiskenässet-Region / Nuuk / Greenland)
Deposits: Myanmar, Sri Lanka, Greenland, Canada, Madagascar, South Africa
Discovery: 1884
1st Description: 1892

Kornerupine

Weight: 2.30 ct

Origin: Sri Lanka

Photo by kind permission of © www.online-edelstein.de, Timo Klopp.

Kornerupine

Weight: 2.03 ct

Origin: Sri Lanka

Photo by kind permission of © www.online-edelstein.de, Timo Klopp.

Kornerupine

Weight: 1.23 ct

Origin: Sri Lanka

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

Kornerupine

Weight: 3.21 ct

Origin: Sri Lanka

Photo by kind permission of © www.djraregems.com, Donna & John Rhoads.

Kornerupine

Weight: 2.17 ct

Origin: Sri Lanka

Photo by kind permission of © rock-logic.tripod.com/, Alexandra Woodmansee.

Kornerupine

Weight: 1.58 ct

Origin: Sri Lanka

Photo by kind permission of © www.edelsteine.at, Thomas Pfneisl.

Kornerupine

Weight: 6.55 ct

Origin: Sri Lanka

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

Kornerupine

Weight: 1.77 ct

Origin: Sri Lanka

Photo by kind permission of © www.wolfpiontek.de, Wolf Piontek.

Kornerupine

Weight: 3.80 ct

Origin: Madagascar

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

Kornerupine

Weight: 0.52 ct

Origin: Madagascar

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

Kornerupine

Weight: 4.42 ct

Origin: Sri Lanka

Photo by kind permission of © www.thegemtrader.com, Brad Payne.

Kornerupine

Weight: 2.64 ct

Origin: Sri Lanka

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

Kornerupine Mineral

Origin: Li Chaung Gyi Mine / Ohngaing / Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com, Sieghard Ellenberger.

Kornerupine

Weight: 0.44 ct

Origin: Tanzania

Photo by kind permission of www.bkkgemstones.com, Trent Anderson.

Kornerupine

Weight: 0.32 ct

Origin: Tanzania

Photo by kind permission of www.bkkgemstones.com, Trent Anderson.

Kornerupine Cat's Eye

Weight: 1.34 ct

Origin: Orissa / India

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

Kornerupine Cat's Eye

Weight: 3.12 ct

Origin: Sri Lanka

Photo by kind permission of © www.online-edelstein.de, Timo Klopp.

Kornerupine Cat's Eye

Weight: 5.07 ct

Origin: Sri Lanka

Photo by kind permission of www.multicolour.com, David Weinberg.