Dims: 3.5 x 1.8 x 1.4" (8.9 x 4.5 x 3.5 cm)
Wt: 5.9 oz. (167 g)
Rooiberg Mine, Transvaal, Republic of South Africa
This small cabinet specimen is made up mostly of Ankerite blades that have intergrown to form a crust. These blades are generally in good condition and reach 0.4" (1 cm) in diameter. Their trigonal bladed form is rather warped due to intense intergrowth but is still discernable. Their color is very difficult to assess, as rust has stained the material intensely. A few exposed faces show a pearly luster and a noticeable iridescence. Given the amount of iron oxide present, one would think that the crystals would actually be made of siderite, but they are not dense enough.