Large 12mm Grand Faceted Blue-Black Agate BeadsAgate is for mental energy and study. Price is for 15 inch string of these striking beads. 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 microcrystalline 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 in the rings of a tree trunk. Different colours