Fire agate, a variety of chalcedony with an ancient and fiery beginning, is an all natural gemstone found only in certain areas of Arizona, northern Mexico, and other parts of the southwestern United States. Approximately 24-36 million years ago these areas were subjected to massive volcanic activity during the Tertiary Period. The fire agates were formed during this period of vulcanism when hot water, saturated with silica and iron oxide, repeatedly filled cracks and bubbles in the surrounding rock, often forming a botryoidal (grape-like) growth.

Fire agate gemstones have beautiful iridescent rainbow colors, similar to opal, with a measurement of hardness on the MOHS scale of between 6.5 to 7 which helps prevent cracking and scratching. The colors found within fire agates, created by the Schiller effect as found in mother-of-pearl and fire opal, is caused by the alternating silica and iron oxide layers which diffract and allow light to pass which forms the interference of colors known as fire. Besides the thin limonite and/or geothite iron oxide layers there is no actual objects inside the gems, the visual effects arise from light interference within the microstructure crystal layering of the gem.

Fire Agate Gemstones For Sale

Photo Fire Agate Cabochon 12.7 Carats 20x16x4mm Deer Creek Arizona Gemstone DCG028
12.7 Carats 20 x 16 x 4 mm
Deer Creek Arizona Gem $250.00
Photo Fire Agate Cabochon 13.1 Carats 16x14x5mm Calvillo Mexico Gemstone MXG021
13.1 Carats 16 x 14 x 5 mm
Calvillo Mexico Gemstone SOLD
Photo Fire Agate Cabochon 3.9 Carats 9.5x7.5x4mm Calvillo Mexico Gemstone MXG022
3.9 Carats 9.5 x 7.5 x 4 mm
Calvillo Mexico Gemstone $35.00

Fire Agate Rough For Sale

Photo Fire Agate Cabochon Gemstone Carving 65.2ct Deer Creek Arizona Gem DCC001
Large Fire Agate Carving
65.2ct Deer Creek AZ Gem $90.00
Photo Fire Agate Cabochon Preform 17ct 17x13x8mm Slaughter Mountain AZ Gemstone SLG070
17 Carat Preform Cabochon
Slaughter Mnt. Gemstone SOLD
Photo Fire Agate Rough Windowed Preforms 78.5 TCW Slaughter Mountain Arizona Gems SLW030
78.5 TCW Preform Cabochons
Slaughter Mnt. Gemstones SOLD

Fire Agate Mineral Specimens For Sale

Photo Fire Agate Gemstone Mineral Specimen Calvillo Mexico Gem Rough Nodule MXM004
Natural Fire Agate Nodule
Calvillo Mexico Gemstone $125.00

Fire Agate Carvings For Sale

Photo Fire Agate Chalcedony Quartz Crystal Carving 131.2ct Deer Creek Arizona Gem DCC002
Large Fire Agate Carving
131.2ct Deer Creek AZ Gem SOLD
Photo Fire Agate Gemstone Carving 13.5ct Claw Shaped Slaughter Mountain AZ Gem SLC002
Fire Agate Claw Shaped Carving
13.5ct Slaughter Mnt. Gem $64.95
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