From A Wiki of Ice and Fire
Chalcedony is a translucent quartz mineral and moganite used for ornamentation. It can appear in various colors. Bloodstone can appear as chalcedony or jasper.
A Clash of Kings
While at the port of Qarth, Daenerys Targaryen is given a wooden box with a mother-of-pearl lid inlaid with jasper and chalcedony by a Sorrowful Man. A manticore attacks the girl when she opens the box.
A Storm of Swords
When the Brave Companions attack a small sept in the riverlands, Zollo pries out the chalcedony eyes from a statue of the Mother.
- ↑ A Clash of Kings, Chapter 63, Daenerys V.
- ↑ A Storm of Swords, Chapter 21, Jaime III.