Quoted By:
Found this curious rock on the side of the road and broke it open to reveal this.
Anyone know what this mineral might be?
Don't know how well this comes across on camera, but it's a dark greenish color and is iridescent. The crystal structure is hard to tell, but from other crystals on the same rock it seems to be like a flattened hexagon, or a cube on its edge with the top and bottom points truncated, I'm not sure. the surrounding rock seems to be feldspar or something.