Mineral 14

Distinguishing Physical Properties:  

• Light colored, pearly luster (can have some appearance level of glassiness).

• Note the shape - if you try flashing it in the light it should have two planes of cleavage at approximately 90 degrees, and it's repeated in the steps that you can see on the edge of this specimen.

• Might note some faint striations if you look closely at this sample.