Chronicles of Bronze
The golden version of the Draconic Crystals.
Gold crystals look like solid gold crystals that somehow radiate an inner glow and respond very well to both fire and holy enhancements, as well as knowledge and wisdom based enchantments.
The most widespread use for these crystals is as a knowledge conference tool. A scholar or leader imprints the crystal, with the help of a wizard, with a set of knowledge or instructions and passes the crystal on to another to use. It is not terribly rare to find a wealthy or lucky cleric in possession of one to help them in their healing of others.
Surprisingly, one of the four crystals on the legendary staff is said to be a gold crystal, used, supposedly, to house all the warlock’s accumulated knowledge about the arcane.