Sphalerite - 6.96 ct - Instituto Gemólogico Español (IGE)

Sphalerite is a mineral composed primarily of zinc sulfide and is the principal ore of zinc. Known for its brilliant luster and range of colors—most often brown, yellow, or reddish—the gem-quality sphalerite can also display exceptional dispersion of light, giving it a fire surpassing that of diamond. The 6.96-carat specimen tested by the Instituto Gemológico Español (IGE) emphasizes its status as a collectible and gem material rather than mere ore. Sphalerite crystals generally form in sedimentary and hydrothermal environments, often associated with galena and other sulfides. While relatively soft compared to traditional gems (Mohs hardness around 3.5 to 4), well-cut sphalerite gemstones are prized for their brilliance and rarity. They are sought after by collectors and sometimes used in jewelry pieces that are worn with care to preserve their delicate nature.