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 HelpCarnelian?

14th Feb 2020 01:48 UTCDanielle Suzette

Would like some help identifying this crystal please?
Carnelian? I haven't had Carnelian with this pattern inside the crystal before. 
Thank you in advance 

14th Feb 2020 05:24 UTCKevin Hean

It looks "Crackle dyed"quartz to me. They heat the stone, then chill it quickly so that it crackles and then dye it. In your case you can see the dye is more prominent in the cracks. 

14th Feb 2020 07:13 UTCDanielle Suzette

Thank you for your reply Kevin

14th Feb 2020 16:24 UTCTravis Hetsler

One way to turn an agate red/orange is to first boil light colored chalcedony in a strong bicarbonate solution.  Iron is placed in nitric acid until it has dissolved, then the boiled agate is soaked in iron nitrate solution for a month before being slowly heated and slowly cooled to produce red agate or carnelian.

This would produce the both the crackling and the darker orange color in the stone, which was likely heated, treated, then heated again. 
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 22, 2020 19:13:32
Go to top of page