Crystals in Eberron

Can all be used as spell catalysts.
No one has ever in the history of Eberron has been able to manufacture dragon shards. The fact that House Cannith can is insane.
Types: Eberron stones, used for torches, lamposts etc. (100gp) Khyber Crystals - Intermediate, purple. Found deep in the earth. Affinity for binding magics. The catalyst to catalyze all catalysts (5000gp) Siberus Dragon Shards - Most powerful, lieraally fall from the sky making them quite rare. Size is variable as is price. (10000k)