Beautiful sphalerite that feels the heat of flames. It has a dispersion ratio about 4 times that of diamonds, and has the charm of being drawn into a strong fire. It is from Spain that is not currently produced. Natural stone: Sphalerite Decoration: Herkimer Diamond, Rutile Quartz, Baltic Amber, Garnet Silk: Ivory Adjustment: Quartz (slide adjustment) String length: about 11cm and 16cm from the center of the stone [About Silk] This work uses silk. It is a delicate silk because it is a natural fiber, but it can be used for a long time with proper care. If you inhale sweat, gently tap it off with a tight towel. Handle with care as it is vulnerable to water and rubbing.