Hibonite
Hibonite
Hibonite

Hibonite

€31,00
SKU: A780
Antranomaro, Amboasary Sud District, Anosy, Madagascar
A naturally fractured piece of hibonite, attractive due to contrasting white matrix residues on the black fracture surface.
1.9 x 1.8 x 1.0 cm
4.0 g

Hibonite is a very rare mineral, specifically a CaAl oxide, which may also contain cerium, titanium, and magnesium, as well as traces of uranium or thorium (slightly radioactive). The mineral has also been found in several meteorites. The mostly black (sometimes brown), hexagonal crystals possess a very high hardness (Mohs = 7.5-8).