- Schorl, Muscovite
- Large Cabinet, 22.5 x 7.0 x 6.5 cm
- Erongo Mountain, Usakos and Omaruru Districts, Erongo Region, Namibia
The complex form of this massive single crystal is accented beautifully by the myriad Muscovites on the crystal. The luster is to be seen to be believed. The crystals faces have sharp, extremely fine striations. These cause a brilliant pearly luster that looks like a diffraction grating.