Pop to Life 3.50 Lab Grown Oval Diamond with Cathedral Style Band and Double-Edge Halo March 13, 2023 Nicola Engagement Rings, Jewelry Diamond Engagement Rings Watch this stunning 3.50 carat oval lab diamond pop to life in a new custom engagement ring. The oval pops perfectly into this elegant pave cathedral setting two-tone ring with a double edge halo. Credit Lauren B Jewelry