Vintage opalescent orchid choker necklace Japanese

The focal cabochon measures approximately 9mm, & is set in a closed-back gunmetal prong setting. It's an opalescent rose color, & it has opal fire. The round faceted beads measure 8mm, & are Czech made. They're an opalescent rose color. The faceted teardrop-shaped beads measure approximately 10mmX7mm. They're an opalescent orchid pink/purple color. The prong setting, eye pins, jump ring, and lobster clasp are gunmetal colored, and are NOT vintage.