Colorless, Light Brown, Yellow, Orange, Blue, Green, Lilac, Red, Pink
Gadolinium Gallium Garnet. 3 G, Triple G, Galliant
Negative reaction to diamond tester, OTL RI, lack of doubling, fluorescence, SG and pavilion flash.
Misnomer: synthetic diamond. GGG has a moderate see-through effect. Stones will have an orange and blue pavilion flash effect. A 6mm round stone will weigh about twice as much as same size diamond.