Thirteen free-form opals, graduated in size and displaying vivid blue and green hues, adorn this mixed-metal necklace. The centerpiece features an 18 kt yellow gold leaf-and-vine motif accented by a bezel-set round white diamond. Two complementary side elements continue the leaf-and-vine pattern, framing the adjacent opals and extending the gold detailing along the design. Each opal is unique and securely bezel-set in sterling silver. The thirteen links are carefully crafted to sit flat and gracefully around the neck, and the sterling silver chain is adjustable to accommodate a variety of necklines.