The International Gemological Institute (IGI) recently analyzed and graded a polished lab-grown diamond over 50 carats—the largest on record—as well as another novelty, a multicolored lab-grown.
The 50.25 ct. diamond, named “Shirpa,” is a type IIa emerald cut measuring 22.95 x 18.45 x 11.57 mm, with G color, VS2 clarity, and excellent cut, polish, and symmetry. It was grown and polished over a period of six months by Mumbai-based Ethereal Green Diamond, using the chemical vapor deposition method. No value was given for the stone.
