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Home / Gem Library / Gemstones Varieties / Fire Agate November 21, 2017

Natural Fire Agate

Fire Agate is a cryptocrystalline silica with excellent hardness, about 7. It is known to occur in only two regions in the world -- the Central Basin of Mexico and the Sonoran Desert areas of Arizona and northern Mexico.


  • There are 68 Fire Agate gemstones available at Multicolour.com
  • Fire Agate(s) are organized in the following categories: CloseoutMixed LotSingle,  gemstones.
  • Our most expensive Fire Agate is USD 41.60 and largest Fire Agate weight is CTS 17.09.
  • Our cheapest Fire Agate is USD 14.99 and smallest Fire Agate weight is CTS 1.53.

Find your Fire Agate

Our Fire Agate(s) are available in various shapes, sizes and colors. 68 Fire Agate(s), too many to look through? You may select any combination of search options. .

Shape Length (mm) Width (mm)
Category Weight (cts) Price (USD)





Fire Agate Profile

Color information: Orange, green, purple, Red, blue, peacock
Refractive Index: 1.544 - 1.553
Chemical Composition: SiO2
Hardness: 7
Density: 2.65
Crystal Group: Trigonal
Ocurrence: Central Mexico, Arizona USA
Sign of the Zodiac: N/A
Month of the year: N/A
Fire Agate Fire Agate
Some of the very finest material comes from the San Carlos Apache Reservation which is also famous for the peridot that has long been mined there. It usually forms as a botryoidal chalcedony, that is, a bubbly appearing semi transparent quartz. The colors in fire agate are caused by the deposition of many very thin layers of iron oxide (probably goethite) on the chalcedony bubbles which were then overgrown with more layers of chalcedony and more iron oxide. The colors one sees are actually produced by the interference of light caused by these very thin layers, something like the effect one sees with oil on water.

There can be quite a range of colors observed in fire agate as well as a fascinating variety of color patterns. You can see bubbles, big, small, and tiny, single or many. You can have broad flashes of color, multiple bull's eyes, almost anything you can imagine. Many stones have a sculptural, three-dimensional quality to them, which is maximized by skillful lapidary treatment. It can be a very challenging stone to cut and polish in a manner that reveals its maximum beauty because the cutter must follow the curves and dips of the iron oxide layers, getting as close as possible to them for best color, but being very careful not to cut thru the layer and leave a spot with no color. Due to the way fire agate forms it is seldom possible, or desirable, to cut standardized, calibrated stone. Instead one must follow the contours established as the stone grew. It requires patience, perseverance, and imagination.

Fire agate can show almost any color. Orange is the most common, with green and purple close behind. Red and blue are the least common. Often the apparent colors are produced by combination of several colors. When all three primary colors, as well as additional secondary ones, are displayed vividly you have the most valuable of stones, sometimes called a "peacock". Although exceptional examples can bring astonishing prices, from hundreds to thousands of dollars for the most desirable stones, it is also quite possible to find lovely cabs at very affordable prices.

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Fire Agate range/
Fire Agate Single
Fire Agate Single Fancy Translucent
Size: 13.90 X 10.80 MM
Weight: 5.200 CTS
Shape: Fancy
Clarity: Translucent
Usually ships within 24 hours
RECOMMENDED
OUR PRICE
USD 41.60
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Fire Agate Closeout
Fire Agate Closeout Mixed shapes Translucent
Weight: 14.580 CTS
Shape: Mixed shapes
Clarity: Translucent
Usually ships within 24 hours
RECOMMENDED
OUR PRICE
USD 14.99
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