many different orthoclase feldspar discovered as colorless to white prismatic crystals in cavities in metamorphic rocks. Some specimens mirror a bluish sheen along crystal faces. This sensation is called adularescence, and adularia using this home is known as moonstone. (identify sanidine).
A transparent or translucent selection of typical feldspar, or orthoclase, which shows pearly opalescent reflections; -- called by lapidaries moonstone.
multiple the typical potash feldspar orthoclase, occurring in highly lustrous transparent or clear crystals. It often shows a delicate opalescent play of colors, and is after that called moonstone (which see). Fine specimens are acquired from different localities into the Alps.