Fluorapatite Crystal in matrix - Cerro del Mercado, Durango, Mexico

Translucent lemon yellow fluorapatite crystals from Cerro del Mercado, Durango, Mexico. Calcite, hyalite opal, and quartz form the matrix. The apatite fluoresces a nice peach color under shortwave UV, and shifts to a brighter violet/peach under midwave. The green fluorescence is thought to be hyalite, but could also be chalcedony.

These are found in veins containing gemmy, lemon yellow to greenish fluorapatite crystals cutting through hematite. The crystals form hexagonal shapes with off-center terminations. They are found in vugs, often associated with quartz and calcite. Most crystals are around an inch in length, though larger crystals up to about 4 inches long have been found.

4 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!