These were confirmed to be emeralds, and the area was immediately developed as a mine to supply Russian nobles with high quality stones. The mine yielded not just emeralds, but other gemstones such as aquamarine and alexandrite. Since then, mining for gemstones has been a major industry in ...
Many stones with inclusions visible to the unaided eye are faceted for use in jewelry. The list includes Alexandrite, Amethyst, Andalusite, Apatite, Citrine, Diopside, Feldspar, Garnet (all colors), Iolite, Opal (Fire), Peridot, Quartz (all colors), Ruby, Sapphire (all colors), Spinel (all...