The International Gemological Institute, the World’s largest independent laboratory for testing and grading gemstones and fine jewelry, with headquarters based in Antwerp, Belgium, announced on September 26, 2020, that in early September, they received two large HPHT-produced lab-grown black diamonds for analysis and grading. They further stated that one of those black diamonds had set [...]
Source: https://news.internetstones.co…arge-hpht-black-diamonds/
