https://labdiamondinsights.com/news/agta-and-cibjo-now-require-synthetic-instead-of-lab-grown-what-the-terminology-shift-means-for-indian-diamond-buyers-in-2026 Lab Diamond Insights en 2026-08-30T00:00:00.000Z AGTA and CIBJO Now Require 'Synthetic' Instead of 'Lab-Grown': What the Terminology Shift Means for Indian Diamond Buyers in 2026