Fire gem

The fire gem holds the power of fire. It was made in the core of the earth. The way that happened is when a little peace of stone reached the core after thousands of years. It took even more years to come back up. The ultimate ninja master found it first and started to create the amulet for it. Many fake gems have been made in a volcano. They are not as strong, but they still have the power of fire, which is all that matters.