orthoclase
/ˈɔrθəˌkleɪs/
noun
- A common pink, white, or gray mineral that is a type of feldspar, often found in granite and used in making ceramics and glass.
- Orthoclase is an important ingredient in some types of porcelain and enamel.
- Geologists identified the pink mineral in the rock sample as orthoclase.
- The granite countertop sparkled with crystals of orthoclase and quartz.