Chrysoberyl
Videos
The mineral or gemstone chrysoberyl is an aluminate of beryllium with the formula Be Al2O4. The name chrysoberyl is derived from the Greek words χρυσός chrysos and βήρυλλος beryllos, meaning "a gold-w
Cyclic trilling of chrysoberyl
Main chrysoberyl producing countries
Rough alexandrite from Brazil
Rough alexandrite under UV light
Pleochroism
Videos
Pleochroism is an optical phenomenon in which a substance has different colors when positioned at different angles with respect to linearly polarized light.
Pleochroism of cordierite shown by rotating a polarizing filter on the lens of the camera
Pleochroism of tourmaline shown by rotating a polarizing filter on the lens of the camera