This impressive Sphalerite crystal cluster from the Troya Mine in Mutiloa, Gipuzkoa, Basque Country, Spain showcases extraordinary gemminess, size, and luster. Composed of large, fully formed, highly reflective crystals, this substantial specimen exemplifies the best qualities of this zinc sulfide mineral, which is prized both by collectors and gem cutters.

Known as the primary ore of zinc, Sphalerite occasionally occurs in such high clarity and rich color that it can be faceted into dazzling yellow, orange, or red gemstones. This raw, natural formation retains such amazing color, with a lustrous surface and striking crystal habit that make it a showpiece for any fine mineral collection.