Meet the pinnacle of lab-grown opal. Glass Opal™ is forged from a pure silica lattice with no polymer stabilizers, giving it the highest heat tolerance and hardness in our entire opal collection. With a Mohs rating of 6.5 and a temperature resistance up to 900°C, this is lab-grown opal built to survive the torch, opening the door for glassblowers, lampworkers, and lapidary artists to push what opal can do.
