- Charlesite and Sturmanite With Calcite
- N'Chwaning #2 Mine, Republic of South Africa
- Miniature, 4.4 x 2.9 x 1.7 cm
- Ex. Martin Zinn
A very interesting specimen of charlesite cores surrounded by sturmanite (they are a series, and portions of the crystal are of different species, thus). These crystals are unusually well-formed to be so rich in charlesite, of which they mostly are composed. Charlesite is more white and lighter yellow, while the sturmanite is darker in hue as a general rule.