This a lovely blue Australia Boulder Opal stone necklace. I've designed a setting that almost resembles a kite. The silver around the stone has been textured and embellished with textured 18Kgold pieces. Hanging from the pendant (kite tail) is a dark yellow faceted Citrine gemstone.
The back has also been textured and stamped with the .935 sterling silver hallmark and maker's mark.
Pendant measures 2-1/2 high (including the hanging gemstone) x 1-1/2 inches wide.
The rolo chain measures 17-inches, plus the hanging pendant. When I make the chain, I try on each piece and check the positioning. Each pendant is a different size, so I usually make my chains a bit shorter than the average 18 inches so that it doesn't disappear under the clothes.