The Solitary Collection it our CZ diamond simulate. 14K Yellow gold PVD plated stainless steel. Lobster Claw clasp. The CZ are all Czech Bohemia Crystal These are all hand set and claw closed CZ diamond Simulate quality. These are perfect as a single solitary piece or stacked and layered. These are waterproof. Hand cut stones for detail Hand linked. The Chain is all 18 with extender and can be worn from 14 to 20