Blue Chalcedony
A variety of 'Chalcedony' [Quartz]
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About Blue Chalcedony
Formula:
SiO2
Blue colour caused by the Tyndall effect (light scattering by colloid sized particles). Transmitted light looks yellowish or reddish rather than blue.
Unique Identifiers
Mindat ID:
39146 (as Blue Chalcedony)
3337 (as Quartz)
3337 (as Quartz)
Long-form identifier:
mindat:1:1:39146:7 (as Blue Chalcedony)
mindat:1:1:3337:0 (as Quartz)
mindat:1:1:3337:0 (as Quartz)
Pronunciation of Blue Chalcedony
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Debbie Woolf | United Kingdom |
Chemistry of Blue Chalcedony
Mindat Formula:
SiO2
Elements listed:
Common Associates
Associations Based on Photo Data:
| 23 photos of Blue Chalcedony associated with Quartz | SiO2 |
| 10 photos of Blue Chalcedony associated with Calcite | CaCO3 |
| 8 photos of Blue Chalcedony associated with 'Limonite' | |
| 6 photos of Blue Chalcedony associated with Okenite | Ca10Si18O46 · 18H2O |
| 4 photos of Blue Chalcedony associated with 'Chalcedony' | SiO2 |
| 4 photos of Blue Chalcedony associated with Mordenite | (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O |
| 2 photos of Blue Chalcedony associated with Apophyllite Group | AB4[Si8O20]X · 8H2O |
| 2 photos of Blue Chalcedony associated with 'Amethyst' | SiO2 |
| 1 photo of Blue Chalcedony associated with 'Gem Silica' | |
| 1 photo of Blue Chalcedony associated with Greenalite | (Fe2+,Fe3+)2-3Si2O5(OH)4 |
Other Information
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 Chalcedony
mindat.org URL:
https://www.mindat.org/min-39146.html
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References for Blue Chalcedony
Reference List:
Hatipogˇlu, M., Tuncer, Y., Kibar, R., Çetin, A., Karalı, T., Can, N. (2010) Thermal properties of gem-quality moganite-rich blue chalcedony. Physica B: Condensed Matter, 405 (22). 4627-4633 doi:10.1016/j.physb.2010.08.048
Localities for Blue Chalcedony
Showing 11 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| |
Japan | |
| Alfredo Petrov |
Malawi | |
| Vanrusselt (2023) |
Namibia | |
| Ernst Schnaitmann specimen |
Portugal | |
| Rui Nunes info |
Romania | |
| Nicu Pascanu Collection |
Turkey | |
| "Dan Costian" Collection |
USA | |
| - (2005) |
| Troy Schmidt Collection |
| Pabian (1971) |
| Douglas Schonewald specimens |
Otjoruharui Farm 251, Omatako Constituency, Otjozondjupa Region, Namibia