Hackmanite is a rare and fascinating variety ofsodalite that exhibits tenebrescence, meaning it can change color when exposed to sunlight or UV light. This unique ability makes Hackmanite a highly sought-after gemstone for collectors.
Physical Properties of Hackmanite:
Color:
Before UV exposure: Pale lavender, white, pink, or gray
After UV exposure: Deep purple or violet (temporary)
Tenebrescence: Can change from light to dark shades when exposed to sunlight or UV light.
Hardness: 5.5 – 6 on the Mohs scale
Common Sources: Greenland, Afghanistan, Canada, Russia, and Myanmar.
