Enstatite, Sanidine
Washougal Basalt Rock Quarry, Skamania County, Washington, USA
A very gemmy and sharp Enstatite crystal points out from a matrix of Sanidine and Titanium Oxides, in a fracture in Andesite. These crystals have a slight metallic coating that causes a beautiful iridescence, but it's so thin that it's only noticeable when the light reflects dead on, as is visible in the photo. Many of these crystals are also ...