Maitri Lab-Grown Diamonds created the emerald-cut, Type IIa stone using the chemical vapor deposition (CVD) process. The company, which has offices in Surat, India, and New York, said it took approximately 1,800 hours (75 days) to grow the diamond.
The International Gemological Institute graded it as H color, SI1 clarity.
IGI said the 35-carat stone is the largest polished lab-grown diamond to date, topping the 34.59-carat diamond