Âme Totem 18K yellow gold bar necklace features approximately 0.30ct. tw. round-brilliant lab-grown diamonds. Every piece of jewelry is unique, therefore weights and measurements may slightly vary. The length is 22". The total weight is 3.42g.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.