Tan crystal imatchedwanso kristalo wa tiyi, ndipo utsi wa quartz (brown quartz) umatchedwanso crystal ya utsi ndi inki crystal Radioactive Makhiristo ambiri a tiyi amakhala ndi mizati ya hexagonal.Monga makhiristo ena owonekera, nthawi zina pamakhala matanthauzo monga ice crack, mtambo ndi chifunga.