Definition from Wiktionary, the free dictionary
- Named for the type locality at Adular, Switzerland.
adularia (plural adularias)
- A variety of orthoclase feldspar found as colorless to white prismatic crystals in cavities in metamorphic rocks. Some specimens reflect a bluish sheen along crystal faces. This phenomenon is called adularescence, and adularia with this property is called moonstone. (See sanidine).
variety of orthoclase feldspar