The Jewels

There are five Jewels located in each of the major regions.

Origins
According to the alternate world's lore, their God used five jewels to create the land. They were white, red, black, green, and blue. The Gems made everyone's lives wealthier, but people in control of them accumulated more political power. The Gems were necessary to have great power, so there were disputes over who would own the Gem mines. This caused conflicts and unease all over the world.

The legendary Hero, who was from Spina, ended these conflicts with his five companions by destroying the Gems and blockading the mines. The only traces of the gems that are left are the Memory Stones, which can be found on all the continents and don't have any strong powers that can be used for war.

However, the five companions made jewels out of the most powerful Gems in each color in case they were ever needed again. Each companion built a town to protect the five jewels. These towns became the foundation of the nations and regions that currently exist.

Mechanics of Jewel Use
Users must form a contract with the jewel before they can use its powers. (Note: specific contract chants seem to vary from jewel to jewel.)

It is possible for more than one person at a time to become users of the jewel.

When the jewel accepts the contract, a mark appears on the user's hand. If the user is more than one person, the mark is distributed amongst the users. In a scenario where the stone is distributed among members and only one member remains alive, the other members' marks will be transferred to his hand. There is a difference between the jewel owner and the jewel user. The owner is the person who literally owns the stone; the user is the person who has a contract with the stone and can use its powers.

Red Jewel
The Red Jewel stops time for its User. It is located in Saia and is guarded by Xiao Mei, Tao, and Yong Soo.

Green Jewel
The Green Jewel accents the magic of the user. It is passed down differently from the rest of the jewels; instead of being handed over from person to specific person, it simply chooses the person that has the strongest magic in the vicinity of the location where it is being passed down.

It's current User is Peter Kirkland

Black Jewel
The Black Jewel has the power to destroy anything. If this jewel is used too much, its user will go mad as a side effect.

To activate the Black Jewel: "I, [name], am the destroyer of time."

It's current users are Gilbert and Ludwig Beilschmidt

Blue Jewel
The Blue Jewel holds the power of creation, making the User able to create anything he or she imagines, as long as they know the material.

To activate the Blue Jewel: "I, [name], am the creator of time."

It's current user is Francis Bonnefoy