Large Fancy Drop Botswana Agate ChunksPrice is per 16 inch string of about 17 agate beads. Largest bead measures about 25mm x 17mm x 17mm. Very heavy! No gemstone is more creatively striped by nature than agate, chalcedony quartz that forms in concentric layers in a wide variety of colours and textures. Each individual agate forms by filling a cavity in host rock. As a result, agate often is found as a round nodule, with concentric bands like the rings of a tree trunk. The bands sometimes