This is not your average crystal necklace - not by a long shot! Made entirely of rock crystal quartz and hand-faceted, each rectangular graduated bead is strung on heavy sterling silver chain that measures 18" around the neck; the beads range in size from 5/8" long to 1" long. These beads are all separated by round rock crystal beads with tiny glistening facets. It ends with an Art Deco design screw barrel clasp. The beads were tested by a gem meter as quartz and NOT leaded glass which is also called, "crystal", and they are heavy and icy-cold, and the chain was acid-tested and is 925 sterling silver. Made in the 1930's, you will find a few minuscule nicks on the facets of a few beads, but it is nothing noticeable in the least.