Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
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 TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced 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 QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Grimaldite

A synonym of Grimaldiite
This page is currently not sponsored. Click here to sponsor this page.
Formula:
CrO(OH)
Synonym:
A synonym of Grimaldiite
Common mis-spelling of grimaldiite. Also, a mineral thought to be new species related to or equivalent to grimaldiite (Frondel, 1972; Milton, et al., 1967). "An oxide of zinc and chromium in the Spinel Group, recently found as a new mineral from Guyana. Evidence for the existence of this compound at Sterling Hill was found in 1952 by chemists of the N. J. Zinc Company, but lack of sufficient material prevented a complete study. Found as tiny reddish-brown octahedrons in the insoluble residue of marble at the margarite occurrence at Sterling Hill [Frondel, 1972]." Later, Milton, et al. (1976) reported the Sterling Hill mineral was a zincian gahnite.


Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
46756 (as Grimaldite)
1750 (as Grimaldiite)
Long-form identifier:
mindat:1:1:46756:6 (as Grimaldite)
mindat:1:1:1750:9 (as Grimaldiite)

Similar NamesHide

CromaltiteA rock subtype

Internet Links for GrimalditeHide

References for GrimalditeHide

Quick NavTopUnique IdentifiersSimilar NamesInternet Links References
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, 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 and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 12:24:52 Page updated: December 31, 2025 23:51:31
Go to top of page