Black Dogtooth Calcite - Mineral Specimen fossils and minerals parts called valves

parts called valves

After some clean up

(This is the black one)

Geological Age: 70 mya

Approximate diameter of beads: 3mmApproximate weight of 1 necklace: 10g

Black Dogtooth Calcite - Mineral Specimen fossils and minerals parts called valvesMined from: Balochistan, Pakistan Description: This specimen shows a dense cluster of black to dark grey dogtooth calcite crystals, with a distinctive stacked, almost feathered appearance. The crystals have a matte to slightly silky surface, with translucent grey edges where light passes through the thinner terminations. Along the base and edges, smaller secondary calcite crystals create a textured contrast, giving the piece depth and a more complex