Blue Chalcedony Clear Quartz Bib Necklace,Large Genuine Gemstone Beaded Necklace

Blue Chalcedony Clear Quartz Bib Necklace, Large Genuine Gemstone Beaded Necklace Made with big, beautiful blue chalcedony beads — it’s got that nice, solid weight that shows it’s real stone, not plastic! Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. In common practice, only the translucent, single-color types of this material are sold under the name “chalcedony.” Blue chalcedony is a highly prized gemstone. The blue variety of chalcedony occurs only when it does not contain many color-changing impurities. This stone is perfect for carving, cutting, crafting, and tumbling. The most valuable natural specimens of blue chalcedony bend the light in such a way that they appear to be lit from within. 22 mm - 19 mm round flat blue chalcedony beads, 4 mm clear quartz square beads The total length is about 18" with a lobster claw clasp and extension chain.