These rock crystals have a very different cut that you don't see that often. They are square in shape but also faceted. Each one is knotted in between. The crystals are slightly graduated in size. The largest are the two in the center which measure 1/2" square. The smallest near the clasp is 5/16". The length of the necklace is 17 3/4". The clasp is stamped 1/20 12K GF. It is still tight and secure. There are very tiny chips on the edges which is very common with pieces of this age. They can not be seen without the aid of a loupe.