MinerShop Blog

Welcome to the MinerShop blog. We write about pretty much anything that sparks our interest. We've sorted our articles into the categories below.

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COLLECTING MINERALS

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FLUORESCENT LIGHTS

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MINERALS

MINERAL DISPLAYS

MINERAL OF THE MONTH

MINERAL PHOTOGRAPHY

PHOSPHORESCENCE

SWEDEN

TENEBRESCENCE

TRIP REPORTS

UV FLASHLIGHTS

MinerShop Blog / Tenebrescent

sodalite from greenland displaying tenebrescence

"Red" Sodalite (Hackmanite) - Deeply Tenebrescent Greenland Mineral

Red sodalite is named for the color it takes on when exposed to sunlight; it is nicely tenebrescent under longwave UV. Under shortwave UV the color deepens, in seconds, to almost black in some areas. 
Posted on November 19, 2024
Tagged: Greenland, Minerals, Tenebrescent
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a piece of fluorescent sodalite hackmanite showing its tenebrescence

Greenland Sodalite Hackmanite - Quick Change Artist, Tenebrescent Champion

Tenebrescence of Greenland fluorescent sodalite is amazing. This is a piece of a deeply tenebrescent sodalite. Note how when the shortwave light is first turned on, the sodalite fluoresces a bright orange but almost immediately shifts to a burnt orange as the tenebrescence sets in.
Posted on October 21, 2024
Tagged: Greenland, Minerals, Tenebrescent
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What is Tenebrescence? (All about Hackmanite - Hint: it's not fluorescence)

What is Tenebrescence? (All about Hackmanite - Hint: it's not fluorescence)

Minerals which are capable of this reversible color change by exposure to UV (or other energy sources), without any change in their essential composition, are said to be tenebrescent
Posted on May 30, 2023
Tagged: Greenland, Minerals, Tenebrescent
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Tenebrescent Tugtupite

Tenebrescence Experiments, Theories, Questions, and even some Facts

Recently I posted a question about Afghan sodalite (hackmanite) after reviewing the MinRec article about Sar-E-Sang. Someone reminded me that there was a large discussion on this topic last year. I dug out that discussion and copied it here to the blog. This is one reason we created Nature's Rainbows - to capture these excellent discussions. 
Posted on February 13, 2023
Tagged: Greenland, Minerals, Tenebrescent
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Greenland Sodalite Hackmanite - Quick Change Artist, Tenebrescent Champion

Greenland Sodalite Hackmanite - Quick Change Artist, Tenebrescent Champion

Tenebrescence of Greenland sodalite is amazing. This is a piece of a deeply tenebrescent sodalite.
Posted on February 13, 2023
Tagged: Greenland, Minerals, Tenebrescent
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Sodalite Hackmanite and Tugtupite Tenebrescent

Video of Tenebrescent Sodalite (Hackmanite) and Tugtupite

Tenebrescence is when minerals change color when exposed to sunlight, also known as reversible photochromism.
Posted on February 13, 2023
Tagged: Greenland, Minerals, Tenebrescent
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