Sphene is an unusual, beautiful, rare, but much underappreciated and undervalued gemstone. It is virtually unknown to the public and therefore ignored by jewelry designers, despite for it's mesmerizing green color and striking brilliance, exceeding the fire of in diamond and showing flashes of gold, yellow and green under the sunlight. The "fire" of Sphene derives from its very high dispersion and combined high index of refraction.