Zinkenite
2.01 ct
Hexagon Cut
7.00 x 7.00 x 5.20 mm
Wolsfberg,
Harz,
Germany.
Brittle
y99388

2.01 ct Hexagon Cut 7.00 x 7.00 x 5.20 mm  Germany Y99388

Zinkenite
Is a Lead Antimony Sulfide with formula Pb9Sb22S42 and hardness of 3-3.5.
It's structure is more like a fibers aggregate not easy to cut and polish. It comes from Wolsfberg, Harz, Germany. Brittle.