Calcite Crystals, Linwood Mine, Buffalo, Iowa


This is a large cluster of transparent, modified rhombohedral calcite crystals on limestone matrix.  It was collected in 2016 from the Linwood Mine, Scott County, Buffalo, Iowa.  At its best under mid wave UV, this piece shows a moderate pink/purple response.  Under short wave UV the calcite fluoresces a dimmer red/pink color.  A dim red response is seen under long wave UV.  This specimen measures 7.5 x 7.0 x 4.0 inches.


Located adjacent to the Mississippi River, the Linwood Mine is one of the largest underground limestone mines currently in operation in the United States.

 Mouse over scrolling images for wavelength information.

Please reload

Recent GlowNotes Posts

Please reload

Visit the GlowNotes Blog to view more - educational posts, equipment, minerals, photography and displays

Related Posts:

Please reload

Email comments or suggestions:


RSS Feed
  • reddit
  • Facebook Social Icon

Subscribe to our RSS (Real Simple Syndication) feed to get new posts delivered directly to your desktop!

Nature’s Rainbows is a non-commercial web site maintained entirely by volunteer hobbyists and contributors.  Our mission is to provide information about UV and luminescence, premium fluorescent mineral photos, and a fluorescent mineral database for the enjoyment of FL mineral collectors around the world.  Information on this web site is covered under a Creative Commons License.

Feel free to contact us with comments and suggestions.

Like us on Facebook!