Celestial, inspiring and eternally elegant. This Solid Gold Interstellar Opal and Lab Grown Diamond Drop Necklace catches the light - or moonlight - to add a drop of the night sky to your look. 14ct Solid Gold Gemstones: 3mm Opal, Lab Grown Diamonds Pendant is 8mm X 3.6mm Adjustable Chain Length: 16" with 2" extender, spring ring clasp