Tourmaline
Pleochroism in a tourmaline crystal, demonstrated by rotating a linear polarizing filter on a camera lens. Photo by Mauswiesel. Public Domain.
Article: What is Gemstone Pleochroism?
Credit: Mauswiesel
Gemstone | Tourmaline |
Natural or man made | Natural |
Gem State | Rough |
Color | RedYellow, |
Transparency | Translucent |
Photo pleochroism | Dichroic (2 colors) |