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 HelpTriclinic tan crystals from Red Gill, Cumbria, England

15th Feb 2017 19:58 UTCBrent Thorne Expert

08576260016026220574326.jpg
These crystals are on the backside of a specimen with linarite and caledonite on the front of the specimen. They are on quartz and are associated with pyromorphite. I am not sure what they are. Any help would be appreciated.

16th Feb 2017 10:14 UTCUwe Kolitsch Manager

Not sure about the "triclinic" - looks more like growth-inhibited pyromorphite. Check cross-section of crystals.

16th Feb 2017 11:02 UTCPeter Nancarrow 🌟 Expert

It is not possible to see any clear detail of the crystal habit in your photo, partly because of the reflections. If it was photographed wet, a dry surface would probably help to show the detail more clearly. (A closer view of the best-formed crystal terminations would also be useful.)


It can be tricky to identify the crystal system of low-symmetry forms with any confidence by eye, even with a well-formed single crystal in hand, let alone in a complex mass of intergrowing crystals, and as Uwe suggested, there is nothing visible here to indicate that it is a triclinic mineral.


Based purely on the apparent habit, colour, paragenesis and locality, with no other certain information, I would tentatively support Uwe's suggestion of it being a member of the pyromorphite/mimetite series.


Pete N

16th Feb 2017 17:21 UTCBrent Thorne Expert

Thank-you for the input. I agree that they are probably pyromorphite with unusual terminations.
 
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 00:56:28
Go to top of page