Dragonshards

Dragonshards aren't magic items themselves but are crystals imbued with magical energy. They play a vital role in the creation of magic items and the performance of certain rituals in Eberron. Dragonshards come in three varieties, each found in a different environment.
Eberron dragonshards are found in shallow soil and often encased in geode-like stone shells. Eberron dragonshards can be found almost anywhere, but the most significant deposits have been discovered in jungle environments, notably Q'barra and Xen'drik. In their raw form, Eberron dragonshards are rosy crystals with crimson swirls flowing in their depths and are typically refined into a glowing powder. This dragonshard dust can be used to fuel almost any act of magic. When casting a spells, Eberron dragonshard dust can be used in place of any spell component that has a cost (the dust's market value is the same as the replaced component).
Eberron dragonshard dust is used in the creation of some magic items, and many powerful tools-such as the lightning rail and elemental airships require an ongoing expenditure of Eberron dragonshards to maintain their enchantments.
Khyber dragonshards are found deep in the earth, often near layers of magma. These crystals typically grow on cavern walls, and superstition says they flourish in areas with significant fiendish activity. Khyber dragonshards are deep blue or dark violet, laced with gleaming veins. Khyber dragonshards have an affinity for binding magics. Elemental binding-which is behind airships, the lightning rail, and elemental galleons requires a Khyber dragonshard to hold the elemental. Khyber shards are rumoured to be used for phylacteries, planar binding, and other effects that trap or manipulate spirits. Khyber dragonshards can also be used for necromantic rites.
Siberys dragonshards fall from the Ring of Siberys, the ring of crystals that encircles the world. While rare in Khorvaire, there are significant Siberys dragonshard fields in the continent of Xen'drik, and this is a potential source of great wealth for explorers. Siberys dragonshards are amber in color, with swirling golden veins gleaming within. These dragonshards are used in the crafting of magic items that require dragonmarks for attunement. Larger ones may be required for eldritch machines or the creation of legendary items or artifacts.