Hibonite

Formula: (Ca,Ce,La)(Al,Ti,Mg)₁₂O₁₉
Mineral class: oxides
Crystal system: hexagonal
Mohs scale: 7.5 - 8
Density (g/cm³): 3.84
Refractive index: 1.790 - 1.807 (neg.)
Cleavage: good
Colors: yellow, brown, grey, black
Transparency: transparent (yellow, brown) - opaque (black)
Luster: vitreous
Fluorescence: -
Pleochroism: -
Largest transparent Hibonite: 0.70 x 0.73 x 0.54 cm?
Deposits: worldwide
Discovery: 1955
1st Description: 1956 (Curien, Guillemin, Orcel, Sternberg)
Name: named after Paul Hibon, a French prospector who discovered the mineral.
slightly radioactive if it contains Ce

Hibonite Mineral

Size: 0.2 cm

Origin: Montignies-sur-Sambre / Charleroi / Hainaut Prov. / Belgium

Photo by kind permission of © Luigi Chiappino

Hibonite

Size: 0.45 x 0.43 x 0.32 cm
Weight: 0.64 ct
Origin: Mogok Area / Myanmar

Photo by kind permission of © www.americanthai.com

Hibonite Mineral

Size: 0.56 x 0.49 x 0.43 cm

Origin: Tha-Yet-Pin-Pyint / near Ka-Pine / Mogok Area / Myanmar

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

Hibonite

Size: 0.51 x 0.44 x 0.33 cm
Weight: 0.50 ct
Origin: Myanmar

Photo by kind permission of © www.gemfrance.com

Hibonite Mineral

Size: 0.70 x 0.73 x 0.54 cm
Weight: 0.71 g
Origin: Myanmar

Photo by kind permission of © www.gemfrance.com

Hibonite Mineral

Size: 2.4 x 1.9 x 1.2 cm

Origin: Amboasary Distr. / Anosy / Tuléar Prov. / Madagascar

Photo by kind permission of © www.irocks.com

Hibonite Mineral

Size: 3.4 x 3.4 x 2.8 cm

Origin: Esiva Eluvial / Maromby / Amboasary Distr. / Anosy / Tuléar Prov. / Madagascar

Photo by kind permission of © www.irocks.com