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 HelpHaven't a clue as to what this is...

29th Jan 2008 03:55 UTCRocky Barney

My mom and I were digging around in my late fathers rockhop and came across this piece....some of the sprays have a greenish tint to them...any help will be greatly appreciated!

Thanks in advance...

Rocky

29th Jan 2008 04:12 UTCMike Salotti

Can you test the hardness of both the sprays and the host rock? That can help narrow it down a little. First, see if you can scratch it with you fingernail(less than 2 Mohs). If that doesn't work try scratching it with a penny (less than 3 Mohs). If that doesn't work, try a steel knife (less than 6 Mohs). If none of them scratch it, it is more than 6 Mohs. Make sure it actually puts a scratch in the surface and not just a mark. This will narrow it down a little. Just try it on a small surface somewhere unnoticeable. What are the total measurements of the piece?

29th Jan 2008 04:29 UTCJim Bean 🌟

Kyanite altering to pyrophyllite?

(wild guess)




does kyanite even alter to pyrophyllite?

29th Jan 2008 05:51 UTCCraig Mercer

Jim I think you have hit this one right on the head...I have recently sold similar specimens from California that contained Pyrophyllite/Kyanite/Andalusite/Sillimanite/Mica and Quartz veins.


Anyway goodluck Rocky.

Craig.

29th Jan 2008 17:57 UTCMike Salotti

Personally, the pale green sections look like micocline (amazonite) to me. Microcline appears in these colors: White, grey, greyish yellow, yellowish, tan, salmon-pink, bluish green, green. It looks like kyanite, also. The only reason I'm leaning away from kyanite is the talcy look of the blades. I have not seen kyanite before that didn't have a "glassier" look. Just because I haven't seen it, doesn't mean it doesn't happen, though.

30th Jan 2008 02:32 UTCRay Hill Expert

pectolite?

30th Jan 2008 03:42 UTCRobert Meyer Manager

Check its hardness. If it is very soft, I would suggest pyrophyllite for the sprays. If it is harder, it could be some member of the serpentine group.
 
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: April 26, 2024 01:39:55
Go to top of page