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.
Austria, Brazil, Canada, India, Madagascar, Russia, Sri Lanka, USA
Red, Yellow, White, gray, Green, Yellow, Red, Colorless, gray, Yellow, Green, White
Red, Brown, Brownish, Red, Red, Black, Brown, Brownish, Red, Red, Black, Brown, Brownish, Red, Red, Black