Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Andean Opal

A variety of Opal
This page is currently not sponsored. Click here to sponsor this page.
07925470017271951735630.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
00864410017271951761068.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
00262640017271951786444.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
07925470017271951735630.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
00864410017271951761068.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
00262640017271951786444.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
00765980017271951795280.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
00864410017271951761068.jpg
Andean Opal

Acari Mine, Acarí District, Caravelí Province, Arequipa, Peru
Hide all sections | Show all sections

About Andean OpalHide

Formula:
SiO2 · nH2O
A greenish-blue opal from Peru.

Visit gemdat.org for gemological information about Andean Opal.



Unique IdentifiersHide

Mindat ID:
43544 (as Andean Opal)
3004 (as Opal)
Long-form identifier:
mindat:1:1:43544:2 (as Andean Opal)
mindat:1:1:3004:1 (as Opal)

Similar NamesHide

AndenopalA variety of OpalSiO2 · nH2O

Chemistry of Andean OpalHide

Mindat Formula:
SiO2 · nH2O
Element Weights:
Element% weight
O61.458 %
Si35.961 %
H2.581 %

Calculated from ideal end-member formula.
Elements listed:
H, O, Si - search for minerals with similar chemistry

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 Andean OpalHide

References for Andean OpalHide

Reference List:

Localities for Andean OpalHide

Showing 2 localities.

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.
Hide all sections | Show all sections

Locality ListHide

- 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Peru
 
  • Arequipa
    • Caravelí Province
      • Acarí District
Hyrśl (2012)
  • Ica
    • Pisco Province
      • Humay District
Locality description
Quick NavTopAbout Andean OpalUnique IdentifiersSimilar NamesChemistry Other InformationInternet Links References Localities Locality List
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 3, 2026 02:44:45 Page updated: July 5, 2026 04:51:21
Go to top of page