Longwave Fluorescent Minerals

Minerals that are fluorescent under LW UV (350nm to 400nm, some 405nm laser - often referred to as a blacklight)
(View all wavelengths on the main page)

Located on the bank of the Mississippi River, in Buffalo, Scott Co., Iowa, the Linwood Mine is one of the largest underground limestone mines currently in operation in the United States.  The Linwood Mine is known to produce beautiful, museum quality calcite and barite...

Tremolite mixed with anthopyllite and/or clino-suenoite from the International Talc Company Mine, Talcville, New York, USA. 10x6x2cm, 145 g.

Under long wave UV light the tremolite fluoresces yellow/orange while the antophyllite/clino-suenoite fluoresces red/violet. Unde...

This post features a large specimen of well-crystallized colemanite from Boron, Kern County, California.  This piece shows a bright multi-wavelength fluorescent and phosphorescent response under UV.  This size of this specimen is 15 x 11 x 8 cm and it weighs 914 grams....

There have been several posts in our Facebook Group (https://www.facebook.com/groups/fluorescentminerals) recently identifying some of the mystery minerals found in pieces from Afghanistan over the past couple of years.  This area yields a large variety of fluorescent...

Fluorite cubes (fluorescent blue) and powdery cerussite (fluorescent yellow) from the Blanchard Mine, Bingham, NM, USA.

The overall size is about 12 x 10 x 7 cm.


Biggest fluorite cubes are between 8 and 10 mm in size. In the matrix there are some small shiny galena cube...

Nosean on Sanidine from the In den Dellen quarries in Germany. The overall size is about 6 x 5 x 4 cm and weights 74 g.

Under long wave the nosean is bright orange, while the sanidine is bluish white. Under short wave there is just a dim red fluorescence. Under nor...

This is a fluorescent, Pleistocene age (approx. 1-2 Ma) Busycon rucksorum whelk fossil from the famous Rucks' Pit site in Fort Drum, Florida.  These fossils occur in the Fort Drum Member of the Nashua Formation, which is exposed in Ruck's Pit in Okeechobee County.  Ruc...

To mineral collectors, the Sweet Home Mine in Alma, Colorado is best known as a producer of some of the finest rhodochrosite specimens in the world. During the process of trimming these rhodochrosites to remove excess matrix, waste material is produced which sometimes...

This lovely 2-color fluorescent specimen contains willemite and sphalerite, and is from the Nelly James Mine (also known as Miller Canyon), in southern Arizona.  As shown in the photographs below, the willemite fluoresces bright green under short wave UV, while the sph...

This beautiful 3-color fluorescent rock features a combination of calcite, willemite and fluorite and is part of a find made by New Mexico based collectors Ken and Gail Hennig, who found several pieces of this material while on a collecting trip in the area of Hidalgo...

This stunning fluorescent rock features a beautiful 3-color combination of calcite, willemite and fluorite and is part of a find made by New Mexico based collectors Ken and Gail Hennig, who found several pieces of this material while on a collecting trip in the area of...

The Electric Opal Claim in Zacatecas, Mexico produced specimens of hyalite opal that were notable for having brilliant green fluorescence under UV, and bright yellow/green daylight fluorescence when viewed under shaded daylight outdoors.  The opal was found in welded v...

This large specimen from the Graymont Quarry in Genoa, Ohio features colorless, transparent fluorite cubes with root beer brown, zoned centers on a light grey limestone matrix.  There are also some white bladed celestine crystals present.  As shown in the photographs b...

This is a brightly fluorescent cluster of root beer brown colored fluorite cubes, with white bladed celestine crystals, from the Graymont Quarry, Genowa, Ottawa County, Ohio.  The bright fluorescent response is activated by organic inclusions in the fluorite crystals....

Pink grossular dodecahedrons and yellow non-fluorescent vesuvianite in a matrix of quartz and calcite, from the famous deposit in Sierra de Cruces. The garnets are dim fluorescent red in long wave and mid wave, likely from Cr3+ impurities. Also included are macro close...

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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.


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