This is a sterling silver Pendant is a unique mosaic of chalcedony, quarts and apatite beads and crystals, freshwater pearls, and 3 blue topaz and 3 clear cubic zirconia. The dimensions are about 2.5” long by 1.75” wide and it comes on an 18” snake chain (that is 1.4mm wide) and has a 2” removable extender.