Cushion Cut Lab Created Ruby GemstoneThese loose faceted cushion cut lab created Ruby gemstones are available for a custom built ring by Nodeform Jewelry. Select your stone size & type, then select a ring setting that fits the shape and size of the selected stone. Add both to your cart and we'll create your ring! Lab Grown Ruby Specs: Sizes: 5 mm 0. 8ct, 6 mm 1. 45ct, 7 mm 1. 7ct, 8 mm 3. 25ct Treatment: Lab Created Some sizes may take 4 weeks to be custom made