Materials

These are some of the magical materials that can be found in the Estian Islands. They are almost all essences of some sort.

Gems

Gemstone	Element	Rune	Deity	Magic School	Essence
Ruby	fire	s Sowilo	Heimdall	Conjuration	Primal (fire)
Sapphire	cold	i Isaz	Aegir	Abjuration	Primal (water)
Amber	thunder lightning	x Thurisaz	Thor	Evocation	Primal (air)
Emerald	poison acid	k Kauna	Loki	Illusion	Primal (earth)
Amethyst	force	g Getho	Tyr	Transmutation	Arcane (lawful)
Opal	psychic	d Dagaz	Odin	Divination	Psionic
Diamond	radiant	a Ansuz	Freya	Enchantment	Divine (positive)
Onyx	necrotic	p Pertho	Hel	Necromancy	Divine (negative)

Each cardinal gemstone is linked with an element, a rune, a deity, and a school of magic, and a type of essence. There are a myriad of lesser gemstones, such as alexandrine, carnelian, and aquamarine, but they are mostly used for decorative purposes.

Gems are useful both as decoration, magical foci, and as high-density value storage. Gems are usually bought and sold at their full value. A transaction involving many thousands of gold is often conducted at least partially in gems. A thousand gold pieces weighs about 20 pounds, while a gem worth the same maybe weighs an ounce. A drawback with using gems as value storage is that unlike metal coins, they lose value if they are split into multiple pieces.