Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
It's a fiery match of vibrant red Cuprite and just as saturated orange Orpiment battle for your votes!
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

Microcline from
Petrick pegmatite, Kingsland Granite Company Quarry (Petrick Quarry), Llano County, Texas, USA


04035790017272029515518.jpg
Microcline, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
04035790017272029515518.jpg
Microcline, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
04035790017272029515518.jpg
Microcline, etc.

Petrick pegmatite, Kingsland Granite Company Quarry, Llano County, Texas, USA
Locality type:Pegmatite
Classification
Species:Microcline
Formula:K(AlSi3O8)
Comments:Crystals in pegmatite occur up to 40 cm, sometimes intergrown with orthoclase. These intergrowths display a bright blue schiller that when cabbed displays a blue "cat's eye" effect.
Luminescent properties:Vermillion-red (SW)
Quality for species:Excellent - world class for species or very significant. (!!)
Abundance at site:Extremely common
Confirmation
Validity:Confirmed
Confirmation Methods:Visual (Fluorescence)
Associated Minerals Based on Photo Data:
Quartz8
- var Milky Quartz2
Biotite6
Molybdenite3
Gadolinite3
Behoite2
Fluorite2
Gadolinite-(Y)2
Thorite2
- var Thorogummite2
K Feldspar1
- var Adularia1
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Petrick pegmatite, Kingsland Granite Company Quarry (Petrick Quarry), Llano County, Texas, USA
Data Identifiers
Mindat Occurrence Record ID:400383
Long-form Identifier:1:3:400383:0
GUID (UUID V4):0
References
Self-collected by Franklin Roberts.
Arthur Smith, Frank Roberts, Denise Bicknell (2008) Mineral News, 24, #1, 6-7.
 
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 5, 2026 06:24:43
Go to top of page