description Hackmanite Overview
Hackmanite is a variety of sodalite known for tenebrescence, the temporary development or strengthening of color after exposure to ultraviolet light. The color change can fade when the material is left in ordinary light, although the strength and duration vary among specimens. Hackmanite may appear white, gray, pink, violet, or blue and is collected both as a mineral specimen and as a gemstone. It was first identified in Greenland and is associated with sodalite-bearing rocks.
help Hackmanite FAQ
What is hackmanite?
Hackmanite is a variety of sodalite known for tenebrescence. After exposure to ultraviolet light, it can temporarily develop or strengthen a purple, pink, or related color.
What does tenebrescence mean in hackmanite?
Tenebrescence is a temporary color change caused by exposure to ultraviolet light. The stronger color can fade again when the specimen is left in ordinary light.
Does hackmanite stay brightly colored forever after UV exposure?
No, the color change is usually temporary. The strength and duration vary among specimens, and ordinary light can gradually reduce the effect.
How is hackmanite different from ordinary sodalite?
Hackmanite is a sodalite variety with noticeable tenebrescence. Ordinary sodalite may be blue but does not necessarily show the same temporary UV-triggered color response.
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