This Egyptian necklace dates from 30 BCE - 300 CE and features green glass beads. "Gold Necklace with Medallion Depicting a Goddess LACMA 50.22.20." Public Domain.
Article: Understanding Gem Synthetics, Treatments, And Imitations, Part 2: Crystal Growth
Credit: “Gold Necklace with Medallion Depicting a Goddess LACMA 50.22.20.”
|Natural or man made||Lab-made|