This 20 inch 5mm Cuban chain is solid .925 silver, held secure with a sturdy box clasp and double safety clasps! The heart pendant is adorned with .45ct of real natural earth mined diamonds. The bale is large enough for a 6mm rope chain or a 6mm Cuban. I paid 450$ for the pendant and 300$ for the chain. Only worn 3 times. Both chain and pendant are stamped .925.