White sterculia gum: type 1 Gold sterculia gum: class 2, 3 Sterculia trees grow on dry and rocky areas. We offer various grades of karaya gum: from granules to powder, with an excellent bacteriological quality. Gum Karaya is used in many pharmaceutical and food applications that require texturing properties: Karaya gum will bring suspending properties, high viscosity for a significant effect on texture even at low dosage, and great water retention properties.