This pretty necklace has twelve stones set in 14ct gold vermeil. Each stone measuring approx. 3 mm.  The overall diameter is 20mm.  It comes in either Amethyst, Blue Topaz, Peridot and Multistone.   The gold vermeil chain is 16" long extending to 18". There is also a matching twelve stone ring.  You can also wear it with the gold side up, it looks lovely.