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Agate is a Chalcedony stone, and is formed after the chemical weathering of other rock. The nature of this beautiful stone can make it translucent in thinner layers. Agate is very sensitive to its environment while forming; contributing to its huge variety in appearance. Agate should not be fired and should be set after firing.

For firing temperature and time on a variety of gemstones, refer to our Gemstone Firing Guide: