Dims: 1.7 x 1.3 x 1.2" (4.3 x 3.3 x 3.0 cm)
Wt: 1.0 oz. (29 g)
N'Chwaning Mine, Cape Province, South Africa
This thumbnail piece is made up mostly of Ettringite by weight. Though most of the exposed material is heavily damaged and incomplete, there are several small crystals that are in excellent condition. These do not tend to exceed 0.3" (8 mm) in length or diameter. All show excellent hexagonal prismatic form and the classic lemon-yellow color and pearly-to-vitreous luster. They are also generally transparent, though internal fractures dim and spoil their clarity. A rust-red material accompanies the Ettringite- it shows some micro-crystalline form, but I cannot identify it.