Is a Lead Carbonate with formula PbCo3 and hardness of 3-3.5.
It has a very high refractive index and the strong dispersion makes it a fantastic gem, especially when is seen under incandescent light or in the sun.
This gem comes from the Kombat Mine Tsumeb , Namibia well known for having produce the best specimen in the world of this mineral; today is quite difficult and good specimens are highly prized.
The stone is had a good cut, very small littlte chip on the girdle,difficult to notice at naked eye,eye clean.Today is hard to find stones from Namibia of this size.
Weight: 10.72 ct.