Sphene, also known as titanite, is a rare and striking gemstone known for its exceptional brilliance and dispersion, which gives it a fiery, rainbow-like sparkle. The mineral is primarily composed of calcium titanium silicate (CaTiSiO5) and is most commonly found in shades of yellow, green, brown, and occasionally, a rare red or orange. Sphene is known for its high refractive index, which contributes to its vibrant luster, and its dispersion is even greater than that of diamonds, giving it a colorful flash of light.

While it is relatively soft compared to other gemstones, with a Mohs hardness of 5 to 5.5, sphene is still used in fine jewelry, particularly in rings and earrings, though it requires careful handling. The gemstone is typically found in metamorphic rocks, with notable deposits in countries like Brazil, Norway, and the United States.

Sphene's rarity, striking colors, and brilliant sparkle make it a sought-after gem for collectors and those looking for something unique. It is also associated with metaphysical properties, often believed to promote mental clarity and strength.