This is an unusual necklace. I believe we are dealing with rhinestones and silverplate. The pendant is four rows of channel set stones that are put together to form a diamond shape. Inside that are 4 faceted stones with flat tops and a center of a single tiny clear stone. The bail is a semi circle of metal and on each side are a round stone. Holding the bail is another pendant of a single square stone set on edge with a surround, like a crown, of 9 stones. The chain is permanently attached near the top, but at the side of that pendant and head off to the clasp. The chains are 7 1/2 inches on each side heading to the clasp. There is a loop on one side that needs to be rounded off. It is a little flat. The clasp works well and just before it is attached to the chain there is a square stone that is set on side. It is a very sparkly on the neck. I do not know its age or composition, but it is beautiful and I know it is over 40 years old. The large pendant is 1 1/4 inches. We are required to collect 6% Pennsylvania Sales Tax at checkout. Thanks for stopping by!