Encyclopaedia Malazica the Younger wiki / Invested Jewels

Kalam: 'Oh, you'll find magic embedded in jewels and such - sorcerors make up dozens of them, all cursed in some way or other. Most of them are a kind of magical spying device - the sorceror can track them, sometimes even see through them. Claws use that intelligence-gathering method all the time.'(DG, UK MMPB, p.471)