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Fortification Agate

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Formula:
SiO2
A variety of Agate

Agate with sharp-angled bands which resemble the outlines of fortifications of a castle.


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Chemical Properties of Fortification AgateHide

Formula:
SiO2

Other Language Names for Fortification AgateHide

Varieties of Fortification AgateHide

Fairburn AgateA unique and rare variety of Fortification Agate from Fairburn, Custer Co., South Dakota, USA.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Fortification AgateHide

Localities for Fortification AgateHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina
 
Australia
 
Canada
 
  • Manitoba
    • Souris
Ormerod, M. J., M.D. (1964) Gemstones of Manitoba: Lapidary Journal, v.18, no. 6, p. 704.
Leiper (ed.), 1966. The Agates of North America
    • Kings Co.
      • Bay of Fundy
Jackson, C.T. and Alger, F. (1829) Remarks on the Mineralogy and Geology of the Peninsula of Nova Scotia. Cambridge.
Iran
http://iranian-agates.freeservers.com/
Mexico
 
  • Chihuahua
    • Mun. de Ahumada
      • Estacion Ojo Laguna
        • Ojo Laguna
Shaub, B. M. (1979) Genesis of Thunder Eggs, Geodes, and Agates of Igneous Origin, Part II: Lapidary Journal, v. 32, no. 4, p. 2548-2566.
Panama
 
  • Panamá Province
Freehan, P. A. (1936) Agates in the Canal Zone: Rocks and Minerals, v. 11, no. 9, p. 170, 171.
UK
 
    • Strathclyde
USA
 
  • Arizona
    • Greenlee Co.
      • Shannon Mts
        • Copper Mountain District (Clifton-Morenci District)
Hunter, R. 1977 East of the sunshine but west of the moon: Lapidary Journal, v. 30, no. 12, p. 2834-2839
      • Gila Bend area
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 348; Richards, R.A. (1956a), Arizona agate hunting, Rocks&Min.: 31: 279-280.
      • Hassayampa
Simpson, B., and Mitchell, J. R. 1989 Gem Trails of Arizona: Gem Guides Book company, Baldwin Park, California, 124 p.
    • Pima Co.
      • Empire Mts
        • Empire District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 348.
  • California
    • Los Angeles Co.
      • Lang
mineralsocal.org
    • Riverside Co.
      • Chuckwalla Mts
        • Chuckwalla District (Pacific Mining District)
          • Chuckwalla Spring
Strong, M. F. 1971a Desert Gem Trails. A Field Guide to the Gems and Minerals of the Mojave and Colorado Deserts: Second Revised Edition, Gem Guides Book Co., Baldwin Park, CA, 80 p.
  • Colorado
    • Las Animas Co.
Minerals of Colorado (1997) E.B. Eckels
    • Weld Co.
[var: Fairburn Agate] Pearl, 1958. Colorado Gem Trails & Mineral Guide
[var: Fairburn Agate] http://www.buenavistagemworks.com/agates/fairburn.htm
www.dnr.state.mn.us/education/geology/digging/agate.html.
  • Missouri
Jay Ellis Ransom,1974, Gems and Minerals of America
Jay Ellis Ransom,1974,Gems and Minerals of America
  • Montana
  • Nebraska
    • Buffalo Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Dawes Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Dawson Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Dodge Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Hall Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Lincoln Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Merrick Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Morrill Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Scotts Bluff Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Sheridan Co.
[var: Fairburn Agate]
[var: Fairburn Agate]
    • Sioux Co.
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
The Minerals and Gemstones of Nebraska CSD U Neb EC 2
  • Nevada
Kunz, 1892. Gems & Precious Stones of N. America, p.133.
  • New Mexico
    • Hidalgo Co.
Minerals of New Mexico 3rd ed.
    • Sierra Co.
The Mineralogist, v. 9, no. 5, p. 181.
  • South Dakota
    • Custer Co.
[var: Fairburn Agate] [Clark, 1993 - "Hey's Mineral Index"]
[var: Fairburn Agate] Clark, Roger (2002) Fairburn Agate: Gem of South Dakota (Silverwind Agates, Publ., Appleton WI); pgs. 21,24,79 et al.
[var: Fairburn Agate] Clark, Roger (2002) Fairburn Agate: Gem of South Dakota (Silverwind Agates, Publ., Appleton WI); pgs. 21,24,79 et al.
[var: Fairburn Agate] Clark, Roger (2002) Fairburn Agate: Gem of South Dakota (Silverwind Agates, Publ., Appleton WI); pgs. 21,24,79 et al.
    • Fall River Co.
[var: Fairburn Agate]
[var: Fairburn Agate] Lapidary Journal, v. 33, no. 6, p. 1410-1415
    • Pennington Co.
[var: Fairburn Agate]
[var: Fairburn Agate]
  • Texas
    • Brewster Co.
      • Alpine
www.austingemandmineral.org
Big Bend Country: Lapidary Journal, v. 16, no. 5, p. 527-530.
Mineral and/or Locality  
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