Barite, Calcite and Franklinite, Sterling Mine, Sterling Hill, New Jersey

This is a large-grained rock containing light grey-colored calcite and barite, and black franklinite crystals; a much sought after mineral assemblage from the Sterling Mine, Sterling Hill, Sussex County, New Jersey. Under short wave UV the calcite fluoresces red/orange and the barite white. The Franklinite is not fluorescent. The size of this specimen is 38.0 x 23.7 x 16.3 mm.

Mouse over the scrolling image to see UV wavelength information.

9 views0 comments

Email comments or suggestions:


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!

  • reddit
  • Facebook Social Icon

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