Gypsum is a hydrated calcium sulfate mineral essential for collectors interested in evaporite minerals and distinctive crystal forms. This monoclinic mineral exhibits remarkable variety in appearance: transparent colorless selenite crystals, white fibrous satin spar, and fine-grained alabaster. Gypsum specimens showcase diverse crystal habits from thick cleavable pieces to delicate needle-like clusters, offering aesthetic appeal and scientific interest across all collection levels.Gypsum deposits occur worldwide in evaporite sequences, hydrothermal deposits, and weathering zones. Notable crystal localities include Mexico, Poland, the United States, and Canada. Selenite crystals from Mexico are renowned for their transparency and size, while Italian deposits produce exceptional rose-colored varieties. Polish gypsum from the Naica region features giant crystals among the largest known minerals. Each locality produces characteristically different crystal development and color.Discover our gypsum collection featuring exceptional selenite crystals, satin spar, and distinctive varieties from renowned worldwide sources. Our selection spans transparent crystals to massive specimens. Browse gypsum samples and add these evaporite minerals to your display collection.