Black tourmaline with good formations where two quartz crystals are visible at a 90-degree angle within the matrix. Orange topaz crystals are also visible within the tourmaline matrix, as well as hyalite variety opal, which changes color from white to yellow under ultraviolet light. A very aesthetically pleasing and high-quality mineral.
Hyalite Var. Opal, Topaz, Quartz, Tourmaline Erongo, Namibia Size: 4x2.5 cm
