“I've always liked this pyrite crystal for the multiple forms it displays, but since collecting it in 1997 I've never tried to decipher them until now. Most prominent are cubic form faces, with triangular octahedral form faces in the corners. But the rougher faces in between really threw me - they are the rare diploid form, which I've never identified before. There are even tiny pyritohedral form faces. See annotated child photo. ”

“Annotated (lo-res) version of parent photo. I've always liked this pyrite crystal for the multiple forms it displays, but since collecting it in 1997 I've never tried to decipher them until now. Most prominent are cubic form faces, with triangular octahedral form faces in the corners. But the rougher faces in between really threw me - they are the rare diploid form, which I've never identified before. There are even tiny pyritohedral form faces. ”

“Three little pyrite crystals on calcite with forms dominated by the cube and octahedron, the left crystal also shows prominent diploid form - see parent photo. Collected May 18, 1997. ”

“Annotated (hi-res) version of parent photo. I've always liked this pyrite crystal for the multiple forms it displays, but since collecting it in 1997 I've never tried to decipher them until now. Most prominent are cubic form faces, with triangular octahedral form faces in the corners. But the rougher faces in between really threw me - they are the rare diploid form, which I've never identified before. There are even tiny pyritohedral form faces. ”