Create your own marquise birthstone necklace- a future heirloom! Choose marquise stone placement clockwise (view second photo). Center white diamond round stone- GH SI1-2. Adjustable 16-22" feeder rolo chain. Pendant without bail measures approx. 15.5mm long + 9.6mm wide. Ruby, Emerald, Blue Sapphire, Moissanite & Alexandrite are priced as lab grown. Gemstone coloring swatches as example only. Contact directly to customize beyond listing options. We have a production time of up to eight weeks once order is placed. Visit our FAQ page for additional ordering information and store policies.