Detailed sheet

hibonite

Identified in Madagascar in 1956, its name honors the French geologist Paul Hibon who discovered it.



CHEMICAL CHARACTERISTICS

(Ca,Ce)[Al12O19]

calcium aluminium oxide



PHYSICAL CHARACTERISTICS

Main color

black

Other colors

brown

sometimes yellow or red shades

Color of streak

brown

Luster

adamantine, greasy

Hardness

7.5 to 8.0

Density

3.85 to 0.00

Cleavage

indistinct

Fracture

conchoidal



OPTICAL PROPERTIES

Transparency

opaque, translucent, transparent

rarely transparent

Refractive index

1.790 - 1.850

Double refraction

0.000

very weak, uniaxial (-)

visible double refraction

No

Pleochroism

absent

Number of colors

1

too often opaque black stone

Fluorescence

none



CRYSTALS PROPERTIES

well shaped hexagonal prisms sometimes doubly ending

crystals system

hexagonal



OTHER INFORMATIONS

Exploited
sites

It is found in southern Madagascar in the province of Tulear, in Burma, Russia in Siberia, the United States in Utah. It is present in meteorites, it has been found in the United States, Africa North, Ukraine.

use in jewelry

The only gem crystals have been found in Burma, it is only a rare collection stone.

Other
Gems

Venez visitez

notre site web

voillot-joaillier.fr

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo consectetur adipiscing elit. Ut elit tellus, luctus nec.

Shopping Cart