Siderite, Calcite, Dolomite from Kaiwu Mine, Hezhang County, Bijie, Guizhou, China. Brown larger lamellar siderite, pale yellow translucent calcite , smaller white dolomite, associated with some shiny golden luster pyrite, sharp crystals, large color contrast. size:9×8×3.5cm, NO.20230403SCD16.