Mindat Logo

Paricutin volcano, Uruapan del Progreso (Uruapan), Michoacan, Mexico

Detailed Mineral List:
Opal var: Opal-CT
Formula: SiO2 · nH2O
Reference: Fritsch, E., Gaillou, E., Ostroumov, M., Rondeau, B., Devouard, B., Barreau, A. (2004) Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru. European Journal of Mineralogy, 16, 743-752
Formula: NH4Cl
Reference: Transactions of the New York Academy of Sciences Volume 11, Issue 2 Series II, pages 28–33, December 1948
Photo: © 2007, JGW. Salammoniac from Paricutin volcano, Uruapan del Progreso, Michoacan, Mexico

2 entries listed. 1 valid mineral.
This page is currently not sponsored. To sponsor this page click here.

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 19, 2014 21:42:15 Page generated: April 28, 2013 06:09:55
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