AN ALEXANDRITE AND DIAMOND CLUSTER RING the cushion-shaped alexandrite is set within a surround of ten circular old cut diamonds, in 18ct gold. Size R Accompanied by report number 11160 from The Gem & Pearl Laboratory dated 22nd April 2015 stating that the natural alexandrite weighs 3.77 carats and measures 9.6 x 8.9 x 5.8mm The alexandrite appears green in daylight and pinkish green in incandescent light