Chrysocolla & Sterling Oval Pendant. Chrysocolla was used in the West like turquoise for jewelry, but pure chrysocolla free of quartz is rather fragile and likely to crack. However, Chrysocolla is often "agatized" in chalcedony quartz. The quartz provides the stone with its polish and durability. This pendant is 28x25mm (1.12" x .99") Chain not included.