This ring is from a bespoke bridal collection. A collection of precious engagement rings and wedding bands.? This fabulous accent engagement ring is made in 18K yellow gold with six prongs setting for extra security. Size 5.25, this ring is set with an heirloom diamond of 1.27cts E VS1 round center stone at 7.13 -7.17 x 4.16 mm? GIA certified, provided by Audrey.? Accent diamonds include 4 of 1.4mm round heirloom melee diamonds and 8 round new and natural 1 mm?0.035 CTW round diamonds; SI1; F ; full cut; and two of 1.5 mm round-faceted Grade A natural color-changing Alexandrite (0.04ctw) under the center stone.? The natural alexandrite gem of Chrysoberyl species with a green to greenish blue color. Its hardness is 8.5 on the Mohs scale, with a refractive index of 1.746-1.755 and a specific gravity of 3.73. It has a double refraction optical character and exhibits color change phenomena. It is usually safe to ultrasonic and steamer and generally safe to heat.