United States: Fire agate is mainly associated with the southwestern states, including Arizona, California, Nevada, New Mexico, and Oregon. These areas are known for the presence of volcanic activity, which contributed to the formation of the agate and the unique optical phenomenon known as fire. Sites such as the Apache Flats Agate Beds in Arizona and the Owyhee area in Oregon are well-known for fire agate occurrences.
Mexico: Mexico is another significant source of fire agate, particularly in the northern state of Sonora. Areas such as the Altar Desert and the Sierra Madre Occidental have yielded beautiful fire agate specimens.
Brazil: Brazil is also known for fire agate deposits. The state of Rio Grande do Sul, located in southern Brazil, is particularly renowned for its fire agate. This region has produced exceptional fire agate specimens that are highly sought after by collectors and gemstone enthusiasts.
These are the main global sources of fire agate, but it's worth noting that some other localities worldwide may also have limited occurrences.