Bloedite is a rare hydrated sulfate found in evaporite deposits in arid climates. This is an outstanding, large, textbook, cabinet-sized example of this rare species. This floater, diamond-shaped crystal is pristine, doubly terminated, dark gray, lustrous, transparent to translucent and has very sharp faces and edges. It measures four and a half inches from tip to tip and is one of the largest crystals in perfect condition that we've ever seen! The chisel-like terminations resemble boat prows and are fascinating. This is an excellent piece from the Soda Lake evaporite deposit of California. Ex. Robert Reynolds collection. Note that this cannot go to humid environments, or it will dry out. These are best protected by a light spray of shellac, and/or mineral oil; and by keeping away from high humidity.