Over 150 minerals have been discovered at the mine, mica being the most prevalent, but also including feldspar, beryl, amethyst, rose/smoky quartz, and garnet.
en.wikipedia.org In the 1930s, the company moved to darker colors such as forest, amethyst and royal blue.
en.wikipedia.org The fraternity flower is the camellia and the fraternity jewel is the amethyst.
en.wikipedia.org The 1st grade medal is adorned with four rectangular amethysts and features a gilded ornament with silver parts.
en.wikipedia.org However, this is witnessed in small artisanal and traditional mines, where the children extract emeralds, amethyst, aquamarines, tourmalines and garnets.
en.wikipedia.org