Definitions

1. noun

A group of rock-forming minerals that make up about 50 to 60% of the Earth’s crust.

“The geologist studied the feldspar composition of the rocks in the quarry.”

2. noun

A type of glass made with feldspar, silica, and other minerals, often used in jewelry and decorative items.

“The artisan crafted a beautiful necklace with a feldspar pendant.”