Log InRegister
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 ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced 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 MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Anahi Mine (Anay Mine; Anai Mine), La Gaiba mining district, Ángel Sandoval Province, Santa Cruz, Boliviai
Regional Level Types
Anahi Mine (Anay Mine; Anai Mine)Mine
La Gaiba mining districtDistrict
Ángel Sandoval ProvinceProvince
Santa CruzDepartment
BoliviaCountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Latitude & Longitude (WGS84):
17° South , 58° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Locality type:
Köppen climate type:


The Anahi Mine lies in a heavily-forested area of plains and rolling hills in the tropical lowlands of far eastern Bolivia, close to the border of Brazil. (Some mineral descriptions for Anahi Mine state it is in the high Andes, but that is not true.) The mine exploits quartz veins in dolomitic limestone. Its products include amethyst (on average, 44% of production by weight), ametrine (33% of production) and citrine (23% of production), along with colorless or milky quartz of little or no value and not quantified above. Most of the mining occurs underground, although some strip pits have been opened.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


1 valid mineral.

Detailed Mineral List:

Quartz
Formula: SiO2
Description: The "citrine" colored portions of ametrine are colored by inclusions of iron oxides/hydroxides, hence it is different from other natural citrine. Some authors would not call it citrine in the strict sense. However, it is correct to say that the mine produces citrine, as this is the name of the gem material "citrine".
Reference: Vasconcelos, P.M., Wenk, H.-R., Rossman, G.R. (1994) The Anahí Ametrine Mine, Bolivia. Gems & Gemology: 30(10): 4-23.
Quartz var: Amethyst
Formula: SiO2
Reference: John Betts website
Quartz var: Ametrine
Formula: SiO2
Reference: http://minerals.gps.caltech.edu/AMETRINE/Index.htm.
Quartz var: Citrine
Formula: SiO2
Description: The "citrine" colored portions of ametrine are colored by inclusions of iron oxides/hydroxides, hence it is different from other natural citrine. Some authors would not call it citrine in the strict sense. However, it is correct to say that the mine produces citrine, as this is the name of the gem material "citrine".
Reference: Vasconcelos, P.M., Wenk, H.-R., Rossman, G.R. (1994) The Anahí Ametrine Mine, Bolivia. Gems & Gemology: 30(10): 4-23.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Ametrine4.DA.05SiO2
var: Citrine4.DA.05SiO2

List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
var: Amethyst-SiO2
var: Ametrine-SiO2
var: Citrine-SiO2

List of minerals for each chemical element

OOxygen
O Quartz (var: Citrine)SiO2
O Quartz (var: Amethyst)SiO2
O Quartz (var: Ametrine)SiO2
O QuartzSiO2
SiSilicon
Si Quartz (var: Citrine)SiO2
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Ametrine)SiO2
Si QuartzSiO2

External Links

http://www.gia.edu/gia-news-research-In-Search-of-Ametrine (article by Robert Weldon of GIA, 2013)

Other Regions, Features and Areas containing this locality

South AmericaContinent
South America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: February 27, 2020 18:14:49 Page generated: February 27, 2020 13:10:18
Go to top of page