This lovely 16.5 inch necklace combines two types of beads. The pendant measures two inches in length. The seller of the beads called them sea kyanite, but I can't find that stone defined in any resource. They have many of the features of genuine kyanite, such as the grain of the stone and the chatoyancy, and I find them very attractive and certainly a natural stone. I interspersed round aquamarine beads to emphasize that color in the other beads, I made the links and clasp from .925 sterling silver.
As always, I'm willing to lengthen or shorten the necklace. No charge, or course, for shortening, but possibly a slightly increased price for lengthening.