Mindat Logo

Prehnite, Calcite

Prehnite : Ca2Al2Si3O10(OH)2, Calcite : CaCO3
minID: 4WK-YT8

Photo Copyright © Ivan A. Novikov  - This image is copyrighted. Unauthorized reproduction prohibited.

Not curved, bluish crystals of prehnite with orange calcite. Size of big crystal - 14x12 mm. This prehnite is abnormal hard (> 7 Mohs). Perhaps the abnormal hardness correlated with the correct crystallinity and low defects. Collected in 2012.

This photo has been shown 177 times

Photo added: 22nd Jun 2012

View User Page & Photos View Prehnite Gallery Create Talk Page Light Background

Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: December 22, 2014 14:17:24
Mineral and Locality Search
and/or Locality:
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds