Sphene, also known as titanite, is a mineral primarily composed of calcium, titanium, and silicon. It is known for its distinctive yellow, green, or brown colors and high dispersion, which gives it a brilliant sparkle similar to that of diamond. Sphene is often found in metamorphic rocks and can be used as a gemstone in jewelry. This mineral has a hardness of 5 to 5.5 on the Mohs scale, making it relatively soft compared to other gemstones. Sphene is valued not only for its beauty but also for its rarity, as it is less commonly found than other gemstones. Its unique optical properties make it a sought-after choice for collectors.