SUPPORT US. If is important to you, click here to donate to our Fall 2019 fundraiser!
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 HelpFront side.

15th Sep 2019 23:14 BSTScott Wilson

Addition to previous post 

16th Sep 2019 00:05 BSTBob Harman

These are parts of silicified (quartz replaced) corals or coral reefs and similar structures. 
I suspect that it was originally associated with a surrounding limestone matrix that, long ago, weathered away leaving the resistant quartz which you now see.

Very similar examples are commonly found in Indiana, and probably many parts of the Midwest and Southeast. This example's appearance suggests it has been lying around in a creek bed or farm field for a very long time.     CHEERS.....BOB

16th Sep 2019 01:05 BSTScott Wilson

Thanks Bob, I live in California. I thought it must be from a cave for sure. All the different directions it was going had me wondering.

16th Sep 2019 15:44 BSTPaul De Bondt Manager

Nice specimen.
Similar ones are found here :

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 17, 2019 19:03:10
Go to top of page