Indulge in the colour changing properties of this lab grown alexandrite diamond ring. A 2.5ct oval cut alexandrite stone sits neatly between two 18ct rose gold crosses. Each cross is complemented by two round cut natural diamonds, totalling 0.12ct. Supported by a solid 18ct rose gold band and a classic four prong setting, the alexandrite stone perfectly captures the light from all angles resulting in intense flashes of green and purple hues.single 2.5ct lab grown alexandrite, four diamonds, 1 3 k m, totalling 0.12ct. Oval cut. Available in sizes a z including half sizes.lab grown gemstones hold the same optical and physical properties as their natural counterparts and offer a superlative cut, colour and clarity. Size 7.1 mm 0.28 in. Material 18ct rose gold. Total metal weight 2.9 gr. 1 oval cut lab grown alexandrite 7 x 5 mm 2.5 ct. 4 round cut diamonds k colour, i3 clarity 0.12 ct total. Colour colour changing. Stone cut oval cut. Anniversary 55th anniversary. Birthstone june.