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Mineralpedia Details for Zircon

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Zircon

Zircon

Named for the Arabic word zarqun, which is "thought to be derived from the Persian zar, for 'gold,' and gun, for 'color.'” Extremely common and widespread, Zircon is found as an igneous and metamorphic accessory mineral, large crystals in pegmatites and carbonatites, and in sedimentary rocks and sands. Despite its frequency, fine, gemstone-quality crystals are rare. Nearly all zircon fluoresces under UV light. Can be radioactive.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/zircon.pdf

Formula
ZrSiO4 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Tabular, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Adamantine 
Color
brown, reddish brown, colorless, gray, green 
Streak
white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Uneven 
Hardness
7.5 
WebMineral
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Mindat
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Zircon from Siberia, Russia

Zircon
            from Siberia, Russia Small greasy reddish brown doubly terminated crystal to 7x3x3mm.
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Zircon from Goiás, Brazil

Zircon
            from Goiás, Brazil Reddish brown, greasy luster first and second order dipyramids with no prism faces. Overall 1.7 x 1.3 x 1.2cm.
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Zircon from Iredell Co., North Carolina, United States

Zircon
            from Iredell Co., North Carolina, United States Reddish tetragonal dipyramid crystal to 1.7 x 1.2 x 1.2cm.
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Zircon from Harchoo, Astor, Diamer dist., N.A., Pakistan

Zircon
            from Harchoo, Astor, Diamer dist., N.A., Pakistan

Orange-red, gemmy Zircon crystal.

 

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Zircon from Khibiny Massif, Kola Peninsula, Russia

Zircon
            from Khibiny Massif, Kola Peninsula, Russia

Large chocolate brown Zircon crystals to 2cm on edge. Much nicer than photos depict!

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Zircon from Pikes Peak, El Paso Co., Colorado, United States

Zircon
            from Pikes Peak, El Paso Co., Colorado, United States

Old, antique specimen with several euhedral reddish brown Zircon crystals. The largest crystal is 9mm on edge. The number on the specimn matches the number on the label.

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Zircon from Ruggles quarry, Grafton Co., New Hampshire, United States

Zircon
            from Ruggles quarry, Grafton Co., New Hampshire, United States
Special Info
Radioactive!!

1-3mm brownish red uranium and/or yttrium rich Zircons commonly found in pegmatites. The "gummite" is a catch all term for various alterations of Uraninite.

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Zircon from Tigerville Prospect, Greenville Co., South Carolina, United States

Zircon
            from Tigerville Prospect, Greenville Co., South Carolina, United States

Well-formed, excellent creamy brown crystals. The main, best crystal is 9mm.

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Zircon from Betroka dist., Anosy, Tuléar prov., Madagascar

Zircon
            from Betroka dist., Anosy, Tuléar prov., Madagascar

Terminated creamy brown Zircon crystal to 2.5cm with a little matrix.

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Zircon from St Peters Dome, El Paso Co., Colorado, United States

Zircon
            from St Peters Dome, El Paso Co., Colorado, United States

Sharp, reddish brown, nice crystals to 1.3cm.

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Zircon from Harts Ranges, Northern Territory, Australia

Zircon
            from Harts Ranges, Northern Territory, Australia

A large, impressive partial Zircon crystal 7cm across!

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Zircon from Miask, South Urals, Russia

Zircon
            from Miask, South Urals, Russia

Old specimen with a large 1.5 x 1.5cm Zircon crystal with a old George English and University of Chicago label.

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