Size: Large 29mm-L x 19mm-W x 5mm-DSize Small: 25mm-L x 14mm-W x 4mm-DQty: 7 Beads / Length: 7.5 in.Weight: 24 g.   Agate is a vibrantly colorful, often banded variety of Chalcedony Quartz. It was discovered sometime between 400 and 300 BC by a...