A very fine and rich display-sized example of colemanite, the classic beautiful mineral from this mine! These robust crystals are considered by many to be world's best of species material. Colemanite, perhaps the best collected and crystallized of the calcium rich borates, seldom comes in crystals so lustrous from other localities, and seldom in crystals so big (or it did so once perhaps, especially in Turkey, but where are those specimens now?). This specimen, a complete floater with no visible points of attachment, is highlighted by several doubly-terminated, lustrous and translucent, ivory colored crystals, to 9 cm in length. It has some subtle color zoning. It has high luster.