top of page

Yellow Fluorescing Calcite, Franklin Mine, NJ

Here is a very small sample of yellow fluorescing calcite from the Franklin Mine, in Franklin, New Jersey. Two traits separate this from most of the other calcite at Franklin. First, it's yellow. Second, it only fluoresces under long wave light. We found this piece during the SuperDiggg on the Mill Site pile and most of the rock was non-fluorescent calcite, with only a small portion fluorescing. After a lucky whack with a hammer and chisel, we separated the best part. Shown in LW, SW, MW and natural. About two inches across.

Nature’s Rainbows is a non-commercial website for the hobby community.  It is 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.

bottom of page