Author: Mark Cole

Photographing Esperite (and other “hard rocks”)

Photographing Esperite (and other “hard rocks”)

Originally posted on Nature's Rainbows in June 2016. I have a nickname for esperite pieces – I call them “hard rocks”, very hard to photograph. Our rocks “glow” like a lightbulb. Imagine trying to take a picture of a Christmas tree. The lights end up looking...

Fluorescent Mineral Photography Studio

Fluorescent Mineral Photography Studio

This article was originally published on Nature’s Rainbow in 2022. While visiting my granddaughter in Florida I had time to revamp my daughter's UV light box. The old one was too small for the large specimens she's been photographing lately, and the lighting was...

Crack that Rock! (You never know what’s inside)

Crack that Rock! (You never know what’s inside)

This article was originally published on Nature’s Rainbow. Seems to go without saying for most experienced fluorescent mineral collectors; rocks that sit exposed to the elements for millennia (give or take a few million years) develop a "rind" on the outside, oxidize,...

Agate from Scott’s Gulf, Smyrna, Tennessee

Agate from Scott’s Gulf, Smyrna, Tennessee

This article was originally published on Nature’s Rainbow in August 2017. A major component of rock collecting (for me) is simply getting out in nature. A buddy dragged me out to a very remote area here in middle TN to hunt for agate. Since I'm a pure "Glow Hound" I...

The Fluorescent Minerals of Greenland

The Fluorescent Minerals of Greenland

This article was originally published on Nature’s Rainbow. The Ilímaussaq complex is one of the world's most fascinating igneous complexes. The abundance of rare elements has resulted in more than two hundred and twenty-five different minerals and many unique...

Monteagle Miner Cave, a Fluorescent Chamber of Icicles

Monteagle Miner Cave, a Fluorescent Chamber of Icicles

Over the 2018 holidays my daughters were in town. One left after Christmas but was replaced by my BFF Howie Green and his wife. Always looking for something to do besides explore the many fluorescent rocks down at my barn, this year we got lucky. My local glowhound...