Andalusite is a naturally occurring pleochroic gemstone. On Mohs’ scale of hardness, andalusite is 7.5. It has a vitreous or matte luster, and primary sources include Australia, Brazil, Canada, Russia, Spain (Andalusia), Sri Lanka, and the United States.
Color
Andalusite is typically found in yellow-green, green, or brownish-red shades. As the andalusite stone is rotated, different colors and different intensities of colors can appear, including olive green, rich reddish brown, or grayish green.
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