Princess Color-Change Alexandrite Bridal Ring Unique Star Wedding Ring June Birthstone Promise Ring Unique Anniversary Gifts Platinum RingThe Alexandrite ring Often described by gem aficionados as emerald by day, ruby by night, alexandrite is the very rare color change variety of the mineral chrysoberyl. That is why the color of Alexandrite changes under different lighting conditions. DETAILS: Material : Solid 10K 14k 18k gold, platinum PLEASE choose platinum if you are allergic to nickel. Main stone : 7mm princess cut lab created Alexandrite Accent Stone : moissanite Stone Cut :