Kool-Jool In 8 oz Jar GemOro All QC holders and gravers

All QC holders and gravers in the GRS system are also compatible with GRS power engravers

Always verify dial compatibility before purchase

these Swiss Made carbide round gravers are pre-cut and ready to use after a quick final polish on a diamond stone or compatible diamond finishing wheel

tempered steel for strength and durability

7mm diameter insert stake

Kool-Jool In 8 oz Jar GemOro All QC holders and graversKool Jool is a protective gel designed to shield heat sensitive stones and organic materials during soldering. Applied directly to stones or surrounding metalwork, it acts as a thermal barrier that absorbs and dissipates heat before it can reach delicate materials. Whether you're working with organics like pearl, coral, and amber or fragile mineral stones such as emerald, turquoise, opal, or dyed stones, Kool Jool helps reduce the risk of heat damage