Phosphorescent Desert Rose Selenite Crystal Cluster. Light Sw/Mw/Lw Fluorescence - Lw Phosphorescence - Chihuahua, Mexico

This desert rose selenite specimen lightly fluoresces pale yellow/blue under a longwave UV light (365nm), and less fluorescent under a true filtered Shortwave UV light (254nm) or a midwave uv light (310nm).
It phosphoresces under a longwave uv light (LW 365nm) only.
The first picture is under LW UV, and the second is the LW UV phosphorescence.

Weight: 92.27 g (3.25 oz)
Approximate Dimensions: 2.25" x 2" x 1.25"
Origin: Chihuahua, Mexico.

*You will need a longwave UV light, a true filtered Shortwave UV light or a midwave uv light in order to see the fluorescence shown in the pictures. The phosphorescence and fluorescence is the best under a Longwave UV light*
*Regular black lights, purple lights, or blue lights don't usually work for fluorescent minerals, so make sure you use the proper indicated UV light*
*Please keep in mind that the higher the UV light's wattage is, the brighter the fluorescent reaction will be*

*Please keep in mind that the higher the UV light's wattage is, the brighter the fluorescent reaction will be*

This specimen was photographed using a Convoy C8 longwave (365nm) UV flashlight. The pictures have not been retouched.

-Shortwave lamps have a range of 200-280 nm and are also called UV-C. (254 nm are recommended)
-Midwave lights have a spectrum of 280-315 nm and are also called UV-B (310-314 nm are recommended)
-Longwave lights have a spectrum of 315-400 nm and are also called UV-A. (365 are recommended)

Please feel free to contact us if you have any questions about fluorescence or fluorescent lights.

*Please keep in mind that exposure to UV light is dangerous. We recommend the use of protective goggles and gloves (or wearing sunscreen in the hands) when handling minerals under UV light*