minimum .25ct 4x4mm princess cut african rubellite tourmaline. rubellite is a gemstone variety of the tourmaline group. valued for its ruby color it exhibits a range of color from pink to red sometimes with a violet tint. on mohs' scale of hardness rubellite is 7-7.5. it has a vitreous luster on crystal surfaces and a greasy luster on fractures. sources include brazil (minas gerais paraida) afghanistan australia burma (myanmar) india madagascar malawi mozambique namibia nepals.
