28 Amazing Large Faceted 14mm Cyan Fire Agate BeadsAgate is for mental energy and study. Price is for 15 1 2 inch string of these striking beads. Each measures 14mm about 28 to the string. As these are natural, each will have a different pattern and colour. What is agate? Agate is nature's most striped gemstone. A variety of micro crystalline quartz that forms in layers and many colours and texture, by filling a cavity in a host rock although it is usually in round nodules with bands looking like eyes