Andalusite is best known for its strong pleochroism and it's unusual color which is frequently a mixture of both red and green. It isn't considered to be a color change stone but it frequently shows two colors, (red and green) at the same time. Rough crystals will often show green in one direction and red in another. The color is difficult to match on any any standard color chart.
Pretty and Unique Morganite Genuine Gem, Antique Cushion Cut, 15.1 x 10 mm, 5.97 carats by AfricaGems on Etsy https://www.etsy.com/listing/245231186/pretty-and-unique-morganite-genuine-gem