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

Improving Mindat.orgSolid silver from Cobalt

28th Feb 2014 17:52 UTCReiner Mielke Expert

http://www.mindat.org/photo-488885.html this is nearly solid cobalt arsenides with possibly some nickel arsenides ( rammelsbergite?) and only a small amount of silver.

28th Feb 2014 17:56 UTCUwe Kolitsch Manager

Message sent.

28th Feb 2014 18:52 UTCRichard Gunter Expert

05655720016044516645004.jpg



There may not be any Native Silver in the polished cut section at all. The Silver cores of the arsenide rosettes have a characteristically strong reflectance, as can be seen in the accompanying photo. Sometimes the Silver cores of the arsenide masses can be leached out and the Silver precipitated in fractures in the carbonate.

28th Feb 2014 18:55 UTCReiner Mielke Expert

Agreed might not be any silver at all.

30th Nov 2014 13:22 UTCRaymond Hietapakka

07189130016044516641460.jpg
Here's examples of my Thunder Bay Native Silver in Quartz beside a similar piece of Cobalt, ON material. One photo is in direct sunlight, one in indirect light...they both look nice and shiny. BUT...under indirect light, you can see that the Native Silver in Cobalt, ON material seems to be the tiny dots in the center of the Cobalt, Nickel, and Arsenic minerals' mammiliary structures. All that shines is not all Silver. In most of the Cobalt,ON cabochon material I've seen, there simply is not the high-grade people assume it to be. Not saying that that there isn't some nice Cobalt stuff out there..

04824310016044516659872.jpg

01517740016044516669322.jpg

30th Nov 2014 16:06 UTCDavid Von Bargen Manager

The specimen on the left is probably pretty much native silver, but the other specimen may have minimal silver (especially if the center of the dendrites are niccolite).

30th Nov 2014 17:07 UTCUwe Kolitsch Manager

Changed to "Unidentified Co/Ni arsenides".
 
Mineral and/or Locality  
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: March 28, 2024 14:22:38
Go to top of page