This intricately carved gemstone holds the secrets of language within its many facets.
Wondrous Item 1,800 gp
Each polyglot gem contains the knowledge of one language, chosen when the item is created. As long as you carry the gem on your person, you are able to speak, read, and write that language fluently.
If you carry more than one polyglot gem on your person, none of them function.
Published in Adventurer's Vault, page(s) 175.