Approximately 6x9mm flat rectangle jet gemstone beads. 6x9x4mm. There are 39-47 beads per 16" strand. Jet has been thought to protect against illness and personal attacks. Jet is an important gemstone for the first chakra, thought to strengthen psychic awareness. Jet beads can be used in antique and vintage style necklaces, but are also versatile enough to be used in modern designs. Get wholesale discounts when you buy in bulk! Questions? Call our friendly sales staff at 1-800-366-2156, or email us.