Colombia, Color: Red, Orangey Red, Orange, Yellow, color shift to Green, Hardness: 6 6.5, Refractive index: 1.55 1.56, Density: 2.66 2.70, Chemical composition: (Na, Ca)(Si, Al)4O8, Crystal structure: triclinic, Origins: Congo, Tibet.
Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
Red, Yellow, White, gray, Green, Yellow, Red, Colorless, gray, Yellow, Green, White
Green, Blue, Yellow, Red, Brown, Blue