Opal Necklace authentic with Handmade Sterling Silver Chain

The opal featured in this necklace pendant hails from West Java, Indonesia, and is associated with petrified wood. The blue/green color is obtained from copper that was mixed in during volcanic eruptions. The stone makes me think of sitting underneath the warm Caribbean waters...The pendant measures 1 1/16 inches x 1 inch. The sterling silver handmade authentic chain adds to the elegance of this necklace. The longer chain pieces were fed through the rolling mill to add texture and are tied together with circular rings. The chain is finished off with handmade rings. The pattern on the hook clasp matches the pattern on the longer pieces of chain. The chain length is 16 inches and the total drop length is just under 18 inches.