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Blue Chalcedony

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About Blue ChalcedonyHide

Formula:
SiO2
A variety of Chalcedony

Blue colour caused by the Tyndall effect (light scattering by colloid sized particles). Transmitted light looks yellowish or reddish rather than blue.


Pronounciation of Blue ChalcedonyHide

Pronounciation:
PlayRecorded byCountry
Debbie WoolfUnited Kingdom

Chemical Properties of Blue ChalcedonyHide

Formula:
SiO2

Common AssociatesHide

Associated Minerals Based on Photo Data:
7 photos of Blue Chalcedony associated with Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
2 photos of Blue Chalcedony associated with QuartzSiO2
2 photos of Blue Chalcedony associated with Apophyllite
1 photo of Blue Chalcedony associated with Agate
1 photo of Blue Chalcedony associated with SmithsoniteZnCO3
1 photo of Blue Chalcedony associated with Monheimite(Zn,Fe)CO3
1 photo of Blue Chalcedony associated with Greenalite(Fe2+,Fe3+)2-3Si2O5(OH)4
1 photo of Blue Chalcedony associated with Phosphorite
1 photo of Blue Chalcedony associated with OkeniteCa10Si18O46 · 18H2O
1 photo of Blue Chalcedony associated with Stilbite subgroup

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 Blue ChalcedonyHide

Localities for Blue ChalcedonyHide

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.
Japan
 
  • Shizuoka
    • Nishiizu
Alfredo Petrov, field trip observations, December 2010
Malawi
 
  • Southern Region
    • Chikwawa
Vik Vanrusselt Collection
Namibia
 
  • Otjozondjupa Region
    • Omatako
Ernst Schnaitmann specimen
Portugal
 
  • Beja
    • Serpa
      • Vale de Vargo
Rui Nunes info
Romania
 
  • Maramureș
    • Șișești Commune
      • Șurdești village
Nicu Pascanu Collection, nr. 357
Turkey
 
  • Central Anatolia Region
    • Eskişehir Province
      • Saricakaya
"Dan Costian" Collection
USA
 
  • California
    • Amador Co.
      • Volcano Mining District
        • Volcano
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028324.
  • Nebraska
    • Dawes Co.
Pabian, Roger (1993) The Minerals and Gemstones of Nebraska, Nebr. Conservation & Survey Div. Educational Circular No. 2.
  • Washington
    • Kittitas Co.
      • Swauk Mining District
        • Liberty
Douglas Schonewald specimens
 
Mineral and/or Locality  
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