72 - Important GRS Swiss Lab Certified Art Deco Design 4.83 Carat Ruby Center Stone, 0.50 Carat Diamond Lady's Ring, Size 6. Mounted in 18 Karat White Gold. Brilliant Step Cut Ruby Center Stone Weighing 4.83 Carats Measures 9.12 by 9.10 by 6.04mm with No Indication of Heat Treatment. Original Gem Research Swiss Lab Certificate