2.86 ct. oval color-change sapphire ring with 0.92 ct. t.w. diamond halo and decorative prongs; this design was inspired by Edwardian design aesthetics and is made in 18K yellow gold. This intriguing sapphire has a moderate color change that ranges from blue to violet in daylight and violet to reddish purple in incandescent light. Truly a must see in person stone! The spectral color of the diamond halo only adds to the allure making this an accessory that everyone will notice.