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The Rock Professor has provided you with a mineral
information card. Print on stock paper, and cut out to
enhance your rock and mineral products.
To print: with your cursor, highlight the entire card below,
right click and select print, then click on "selection"
and print.
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THE ROCK PROFESSOR
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Fire Agate
Image attributed to
© GIA.
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FIRE AGATE
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FIRE AGATE is a gemstone variety of chalcedony (quartz family) where layers of heated iron oxides and silica line cavities in rock. Light passing through the many thin layers gives a reddish, fiery glow, from which the name fire agate is derived. The agate has a hardness of 7, and if carefully cut and polished, can make a glowing, multicolored gemstone.
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Family: quartz ♦ Species: chalcedony ♦ Chemistry: SiO2 (same as quartz) ♦
Crystal system: hexagonal ♦ Moh's Hardness: 7 ♦
Unusual Properties: optical illusion of depth and play of color.♦
Cleavage: none ♦ Locality: USA (Arizona), Mexico and Brazil
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