Flux process has been invented by Tom Chatham in the 1930’s. It has slow cycle, which needs 6-12 months for growing crystals. Melted with a flux and cooled very slowly mimicking the nature’s processes. It is worth waiting for expensive gemstones. Flux process is expensive, as Platinum accessories & crucibles are used. The un-dissolved flux results in small inclusions like natural gemstones. The product is very stable with a life-time guarantee for the colour.
LifeGem uses rough stones made from this process for Emerald.