Arpeggio Crystals

What is known about the Arpeggio Crystals:
 * Crystals are ‘tuned’ with a magical spell. The spell is a closely guarded secret within the Magearch (Wizards guild in Ma Khvaron).
 * Crystals that are not pure and whole are unable to hold the power of magic.
 * Even pure and whole crystals are not guaranteed to withstand the tuning process. Sometimes the effects are less permanent or not as powerful or the crystal shatters during tuning.
 * Larger crystals can be tuned by more mages creating a super powered crystal, these types are used to power the airships throughout Ma Khvaron.
 * Crystals are mined by the Dwarves of Great Mangua, specifically the Karaihe Clan . They charge a steep price for what used to be discarded ‘jewelry’.
 * Small crystals (hand sized) that have been tuned to power devices such as guns and zistors (radio like crystals) have been known to burst under duress.
 * Some small crystals are available for personal use, usually costing about 50g. With the know how these crystals can be used to make mundane items ‘self powered’ and have several other practical applications: Toggle light source (as hooded lantern), plant growth accelerator,