Is a hydrate ferric sulfate with formula Fe2(SO4)3•9H2O and hardness of 2.5.
Is a very sensitive, brittle and soft mineral that can deteriorate if exposed for long time in a dry atmosphere.Soluble in water,therefore in addition with it's low hardness is extremely difficult to cut and polish, therefore the surface may not reach a high lustre and quite often some little cavities may be seen of the surface.
In minor parts is associated with other mineral ,such as copiapite,romerite,chalcantite,metavoltite,alunogeno and halotrichite.The coqiuimbite is mauve-purple color,while metavoltite is brown,romerite yellow and halotrichite has whitish fibers look.
It comes from Javier Mine (Javier Ortega Mine),Ayacucho Department,Lucanas Province.Hua-huas (Huacuas ) Peru.
An off-limit stones to be facet, rarely seen in the market.Must be handle with good care.
Size: 16.3x11.6x7.5 mm.
Weight: 7.61 ct.