Agate is a common stone primarily made up of Chalcedony and Quartz in a wide variety of colors. When the layers of Quartz and Chalcedony are prominent, the Agate is often called "Banded Agate". Often formed in volcanic rock, Agates have been used in jewelry for thousands of years. These 8mm beads are polished and dyed blue.
Semi-precious stone beads are mined all over the world and then are usually cut in China. They will often be dyed or color-treated to enhance their appearance. We select the best quality semi-precious that is available, and try to avoid finishes that are not durable. It is best to assume that some semi-precious beads will fade over time.