Dims: 2.6x1.4x1.7" (6.5x3.6x4.2 cm)
Wt: 3.0 oz. (86.3g)
Broken Hill Mine, Kabwe, Zambia
When I purchased this specime, I thought that the tarbuttite was the scattering of milky crystals and that the clear ones were calcite. I was wrong - with a loupe, I could see that the clear ones are tarbuttite, also, and these are excellent crystals. They are relatively small (a millimeter or two), and they have perfect tabular form, looking like flattened colorless fluorite crystals. This tarbuttite "druze" covers much of the limonite base, so there is a lot of the mineral on this specimen.