Round Cut Lab Created Alexandrite GemstoneThese loose round faceted cut lab created Alexandrite 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 Alexandrite Specs: Sizes: 4 mm 0. 3ct, 4. 5 mm 0. 44ct, 5 mm 0. 64ct, 5. 5 mm 0. 75ct, 6 mm 1. 1ct, 7 mm 1. 8ct, 7. 5 mm 2. 0ct, 8 mm 2. 5ct Treatment: Lab