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:
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

Identity HelpSuggestions for quartz locality

29th Jan 2020 09:21 UTCGianna Ragagnin

Hi all,

at our rockhound club (Sweden based) we recently inherited a part of a collection from two (now deceased) former members. A lot of samples are unlabelled and their daughter wasn't able to help us with that. It sounded like the couple had traveled to many localities around the world.

Among samples, we got a lot (at least  1-2 kg) of nice quartz crystals like the one in the pic, many isolated, but also groups (no matrix rock, only quartz and no other minerals associated).
Mostly show Dauphine habit, with a layer of flaky tiny hematite inclusions on the surface or just beneath, hence the pinkish hue.
I tried to look for locality suggestions by looking in the quartz gallery, but there're thousands of pics, so I wonder if someone here, more expert, could come with suggestions of possible localities, or where to start search.
Thank you.

29th Jan 2020 10:46 UTCAntonio Borrelli Expert

I have similar in my collection from Diamantina, Brazil.

30th Jan 2020 07:47 UTCGianna Ragagnin

Is the colour a coating of iron oxides or are they inclusions?

30th Jan 2020 09:34 UTCAntonio Borrelli Expert

Coating of iron oxides.

30th Jan 2020 09:57 UTCGianna Ragagnin

Thanks. In my case it isn't a coating, but inclusions.
Location could anyway be the same.

30th Jan 2020 08:10 UTCJohn Sobolewski Expert

Similar crystals were sold by some Brazilian dealers about 20 years ago at the Tucson show. They called them Tangerine Quartz with a location of Diamantina, Minas Gerais, Brazil. John S.

30th Jan 2020 10:00 UTCGianna Ragagnin

Thank you.
I googled this location's quartz and it looks like it's the same kind of crystals, with colors and inclusions.
Maybe the mystery is solved!

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 21, 2020 19:38:16
Go to top of page