This beautiful engagement ring features a 5mm round cut beautiful lab grown alexandrite surrounded by natural diamonds. color-change stone in 14k/18k gold , Nadia style, Marquise Alexandrite engagement ring: Sterling Silver, 10k/14k/18k gold, Platinum 5mm round Cut Color-changing Lab Alexandrite 0.12ct Round cut SI-H natural conflict free diamonds Band width approx 1.3-1.5mm