Hibonite
Hibonite
Hibonite

Hibonite

€35,00
SKU: A779
Antranomaro, Amboasary Sud District, Anosy, Madagascar
Part of a hibonite with an interesting, coarse fracture surface. Matrix residues indicate that the fracture was of natural origin.
2.3 x 1.7 x 1.2 cm
6.8 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).