Peridot

Project Red
Peridot is a gem added by Project Red and is obtained by exploitation of Peridot Ore. It's main purpose is to craft the peridot version tools added by Project Red. These are:
 * Peridot Sword
 * Peridot Pickaxe
 * Peridot Shovel
 * Peridot Axe
 * Peridot Hoe
 * Peridot Sickle

Trivia

 * In the real world, peridot is the gemstone variety of the mineral olivine.