Natural Cobalt-spinel

B9900
One transparent gemstone

Carat: 0.180

Measurements: 3.21 x 3.19 x 2.23 mm

Form: Octagonal

Identification: Natural C O B A L T - S P I N E L

Colour: Intense blue

Geografic origin: Mahenge (Tanzania)

Comment: No indications of any treatment