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

parts called valves

(This is the black one)

we still refer to them both as jade

They are long lasting and hold the charge well

The ears of a woolly mammoth were smaller than an elephant we see today because they minimized frostbite and heat loss from extreme cold weather

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