Andalusite
July 19, 2021How Many Colors Can Andalusite Show?
Andalusites. Photo by cobalt123. Licensed under CC By-SA 2.0.
Andalusite has very distinctive and attractive pleochroism. This gem can show up to three different colors (trichroism) depending on the viewing angle and the gem’s cut and orientation. Sometimes, andalusites can even show multiple colors from one viewing angle.
What are the Best Gem Shapes for Andalusite Jewelry?
Gem shapes with a long axis such as ovals, marquise, or emerald cuts tend to show one color near the center and a second, usually darker color, near the ends. Square and round cuts usually blend the colors into a mosaic.
Sometimes, lapidaries cut these stones to show pink and almost colorless shades. Others cut to display green in the center of these stones, with browns or various other combinations on the tips, depending on the rough orientation before cutting.
Poorly cut and polished stones may appear dull. As Type II clarity grade gems, andalusites usually contain inclusions, so a large, eye-clean, well-cut andalusite will demand attention. With a hardness of 6.5 to 7.5, it could find a home in almost any type of jewelry setting.
https://www.gemsociety.org/article/andalusite-jewelry-and-gemstone-information/
