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Walter R. Kellogg

 

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Mineral Specimen #3626    Sodalite variety Hackmanite

Poudrette Quarry, Mont Saint-Hilaire, Rouville RCM, Monteregie, Quebec, Canada

Ex. Charles Ward

Hackmanite is a variety of Sodalite which is known for its tenebrescence - meaning it changes color when exposed to ultraviolet light. The color it changes to is purple. The affect only lasts a short amount of time with the color quicky fading. This specimen is massive material from Mt. Ste. Hillarie. A friend of mine collected some similar material there years ago. It was in the summer and the sun had enough UV to cause the purple color. He said, however, when a cloud would pass overhead, the color immediately faded. Under LW, this specimen fluoresces a bright orange. Under SW (with the lights turned off), the specimen fluoresces a dull red with a few bright yellow spots of an unidentified material.


8 x 8.4 x 7.1 cm

$75      Click here to order this mineral.                                                                                                                                                              

This mineral is also found in the following galleries: Minerals From Canada | Tectosilicates | Fluorescents | Polished & Worked | Minerals Priced Between 50 and 99 Dollars
This mineral is also found in the following galleries: Minerals From Canada | Tectosilicates | Fluorescents | Polished & Worked | Minerals Priced Between 50 and 99 Dollars