Can someone please tell me what type of stone this is?

Question

Answer 1

To me it looks like flourite. It could be tourmaline or calcite. Herschel is better than I ever could be. He knows more about the shapes of the crystals.

Comments

Hard to tell if its opaque, has a metallic luster, etc. Can you post a few more pictures, and see if it lets light through it? This way we can identify its transparency and luster and perhaps see additional crystal faces.

Answer 2

Shape and color makes me think Labradorite...