Green Sapphire

Green Sapphire is a gem both added by RedPower 2 and GregTech 5. Their main purpose is to craft tools.

Green Sapphire tools are the tier between Iron and Diamond. While they have the speed of diamond, they only have 501 uses, and Green Sapphire pickaxes can't mine Obsidian.

Green Sapphires can occasionally be found in Dungeon chests.

Usage
Green Sapphires can be used to craft the basic tools, Saws and Sickles. A Green Sapphire is also required to craft the Sonic Screwdriver.