This mod currently adds 3 new gemstones to the game, Amethyst, Topaz, and Jade, this is my first mod I have ever made so I apologize if it isn't very good.
Amethyst is a rare gem found in the Overworld around the same level as Diamonds, It can be used to make tools and armor both of which with high enchantability.
Topaz is a rare gem found in the Nether, that also can be used for armor and tools that also have high enchantability.
Jade is another rare game found in the End, same thing as the previous 2, tools and armor, high enchantability.