Typical opal specimen found in the Mojave Desert region of California. Opal exhibits play-of-color in a patchy pattern. Portions of the original matrix is visible. 20x magnification photomicrography.
Carved orthoclase feldspar mineral, also commonly known as moonstone. Considered a semi-precious gemstone. Image depicts the optical lighting effects or phenomena of chatoyancy. Photomicrography at 20x magnification through microscope.