Eberron - Return of the Lich Queen
Eberron shards are found buried in shallow soil in clusters encased in geodes. They are found only in Khorvaire and Aerenal. Eberron shards have a pinkish appearance and churn with crimson blood-red swirls. They are commonly known as bloodstones. Eberron shard items store magical energy or psionic power as spellbooks, spell-storing items or psionic power stones. Intelligent magical items often incorporate Eberron shards. Their magical affinity is very broad compared to the specific powers of Siberys and Khyber shards. Spellcasters can attune Eberron shards to a specific spell, enhancing the power of that spell when it’s cast on the shard, and they can encode their spells in shards instead of scribing them.