Pure crystal of magic

=Origin:=

A common material found in all caves in Kazad-Rah, easy to mine, handle, and use. The locals are simply unwilling to sell them. They are willing to trade the crystals for something of huge sentimental value, no matter the actual numerical value it would be in coins

=Effect:=

Similar to the Devil Gems, only instead of storing spirit or demonic energy, it stores spells. The truly pure crystals will only accept spells from a male spell caster or a human female caster, there are also a corrupted variant that is not based to Mamono spell casters.

In truth, the purity of the crystal depends on how see-through the crystal is, and has nothing to do with whether or not it accepts spells from a Mamono. There is also no upper limit on the number of spells that can be stored in the crystal, but if the type of spells conflict, such as a fire spell with an ice spell, the crystal will shatter.