I-Gem grade periodt ihlukaniswe kakhulu ibe yinkathi ephuzi ephuzi-luhlaza, inkathi eluhlaza okwegolide, inkathi ephuzi-eluhlaza okotshani, inkathi eluhlaza okotshani (eyaziwa nangokuthi yi-dusk emerald noma i-emerald yasentshonalanga, i-primrose emerald yakusihlwa) kanye netshe lesibhakabhaka.