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 Time
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 MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Identity HelpSpecimen/Locality ID (1)

11th Aug 2010 01:08 UTCMonica Ceretti

05389490016034392598954.jpg
Copyright © mindat.org
Hi All,


I'd appreciate your help identifying the minerals present in the specimen below and any info you can provide regarding locality. This specimen is heavy, weighing 5 lb 9 oz and measures approximately 4 1/2" x 3 1/4" x 5 3/4".


As always, my sincere thanks for your help. I look forward to your input.


Monica

05822760016034392592916.jpg
06520810016034392595827.jpg

11th Aug 2010 02:05 UTCJake Harper Expert

I believe it is massive crystalline calcite from Mexico.


Cheers,

Jake

11th Aug 2010 19:19 UTCDon Saathoff Expert

It's heavier for it's size than calcite,,,,,I think fluorite and agree with mexico.....

12th Aug 2010 16:46 UTCMonica Ceretti

08447150016034392599456.jpg
Copyright © mindat.org
I neglected to mention that this specimen has a very waxy feel. Does this jive with fluorite?


Also, there is a pink band near the bottom of the specimen that appears to have the same waxy feel except in a few small spots at the end where it appears the specimen was separated from the host specimen. I've attached some additional photos of this pink band. Do you think this a different mineral or the same mineral (fluorite?) in a different form?


Again my thanks.

M.

09577910016034392598998.jpg
07771340017146917998461.jpg

13th Aug 2010 13:37 UTCNoah Horwitz

That is calcite for sure, from Mexico. It should be possible to find a more specific locality for this green calcite. I think pieces from this locality are usually acid etched, which gives the surface a very smooth, "melted" appearance. They might apply some wax to seal after the acid treatment too; not sure.


If you can find cracks/fractures in the green crystals, this should help confirm calcite or fluorite. Fluorite will have a cubic cleavage, while calcite will produce rhombohedra.
 
and/or  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, 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.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 2, 2024 23:16:39
Go to top of page