Pearl

Pearl is a gem stone, only to be found in deep waters. It forms slowly when there is a breach between the Neven Realm and the Saeli Domain. In order for the pearl to form, there needs to be an underwater geyser and high pressure.

Special Abilities
Because of its shape, there is no way to withdraw energy from it. It can only be unleashed by breaking the crystals structure with a big point force. Once the energy is unleashed it has to be quickly transmitted into some other energy form at once, or it will either vanish or turn into pure heat.

It is the only crystal that unleashes its entire energy after its structure gets broken. It is very often used to power various fields, including forcefields. Because once the Pearl bursts with its energy, it is distributed in a form of an ideal sphere, thus it is easier to maintain the fields shape.

Occurrence
They exist in the deepths of the seas and until year 1250 they have also been aquired in the Mortian mines of Halyut. Now they are very hard to acquire, after the  The Candarian Rage  Cataclysm - that caused the fall of the Aquanite empire, leaving merely a thousand living Aquanites living safely in the mediterranean sea, sealed off from the  Candaries by the Mediterranean Sea Gates  the only safe place where the pearls can be collected safely are the Mediterranean Depths. Due to the fact that there are less aquanites to collect the crystals, they have become very valuable.