Magic Crystals

Magic crystals are conduits of power that any intelligent being can use to cast magic. One does not need to even know the concept of magic to activate the essence in the crystals; with enough raw emotion from someone holding a crystal is enough to cast a magical spell, albeit by accident. To truly harness the power of a magic crystal, a being needs to have enough knowledge to control a School of magic with the appropriate crystal. As there are four kinds of natural crystals (and one synthetic), you can technically use any crystal but you might get the desired potency unless you are using the correct one. They are as follows:

Thrallum
Thrallum crystals, red in nature, often deals in life-force magic and of all the crystals the rarest in the continent. Because of these two characteristice, it is often rumored to be crystallized blood from the gods in ancient times. Mostly used for necromancy but can be very powerful when used for healing magic.

History
One of the most infamous times that Thrallum crystals were used was when a monolith socketed with various gems of Thrallum was erected in the middle of the city of Myrkvan and a group of necromancers, now known as the Last Seven, used its power to necrotize every living thing in the city. The incantation was so strong, however, that it imbued most of the country of Darkale with corrupted essence.

Another time Thrallum was used to a history-altering expanse was during the war for Rykeru. As the Last Seven was invading the homeland of the Drakani, a race of shape-shifting dragons, a Wizard by the name of [-] came to the Drakani's aid. But Alas Tayle, the leader of the Last Seven, was prepared for any mounted defense and had created a spear, completely covered in Thrallum, and lunged it at the Wizard, killing him and rendering his Magic Essence into nothingness.

Veret
Veret crystals, often with a strong blue hue, have a space-altering essence, often used to create portals to travel vast distances. If the wielder is knowledgeable and powerful enough, they can even achieve teleportation without creating portals. They can be mostly found by the Shyem's Breath in Ourcwood.

Aelom
Aelom crystals, found to be emerald-green, have alteration and transmutation properties. They are often used for simple metal transmutations, shape-shifting, animal mimicry, and shadow-casting. These gems are known to be found in underground caves below Orenia forest in Waydale.

Urul
Urul Crystals, a purple mineral, has incredible power when dealing with elemental magic(fire, water, air, and earth). The only gem that can actually be grown, but only from the source, in the mountain passes of Timoor.

Zidarin
Zidarin is the most common of all the crystals, as they are synthesized by humans. It can be used in any sort of magic but it is also the weakest of all magic crystals. They are clear in nature.