Gemstone magic

Gemstone magic, also known as the School of gems (from adcovtle Laceclo ad toraci), is the primary magic of Covtle and the Wiþi Empire. It was first discovered by Baðatrepava in -27 in the Ancient Land. It uses the fuwagli found in emeralds to power other gemstones connected through gold strings. It has a wide variety of applications, used in everything from household items to weaponry. It is the only legal magic in the Wiþi Empire (with some exceptions) and is widely used across the empire. It has minimal usage outside the empire, and is banned in Fole Enkan, Šalva, and the Ancient Land.

Theory

Properties of various gemstones

Gemstone	Property
Emerald	Stores energy
Ruby	Makes light and heat
Opal	Takes away light and heat
Diamond	Creates invisibility
Sapphire	Creates a physical (kinetic) force in a certain direction
Pearl	Absorbs a physical (kinetic) force in a certain direction
Jade	Broadcasts information
Quartz	Receives information
Amethyst	Teleportation, and perhaps time travel (unverified). Extremely volatile