Âme Trio 18K white gold pendant necklace features an approximately 0.28ct. Asscher-cut lab-grown diamond. Every piece of jewelry is unique, therefore weights and measurements may slightly vary. The length is adjustable from 16" - 18". The total weight is 1g.Lab-grown diamonds have the same chemical, physical and optical characteristics as mined diamonds, but are grown above-ground rather than under. Learn more about lab-grown diamonds here.