Sphene, also known as titanite, is a rare calcium titanium silicate mineral prized for its brilliant luster and exceptional fire—dispersion even higher than that of diamond. Typically found in shades of green, yellow, brown, or reddish hues, sphene often displays strong pleochroism, meaning it can show different colors when viewed from different angles. It commonly forms in metamorphic rocks and granitic pegmatites and is valued both as a collector’s mineral and a gemstone, though its relative softness (Mohs 5–5.5) makes it more suitable for pendants or earrings than rings. Sphene’s distinctive wedge-shaped crystals and high refractive index make it an eye-catching and sought-after gem for those who appreciate unique and vivid natural stones.