Andalusite
is named after Andalusia, the province of Spain where it was first discovered.
Andalusite is pleochroic,
different colors in different directions. When cutting most pleochroic
gemstones, such as iolite and tanzanite, the trick is to minimize the
pleochroism and maximize the single best color. Andalusite is the opposite:
cutters try to orient the gem to get a pleasing mix of colors: orangey brown and
a yellowish green or gold.
When they succeed, Andalusite looks unlike any other gemstone, with patterns of color dancing around the
facets. The best color play is seen in fancy shapes, particularly rectangular
cushion shapes: in round cuts, the colors blend together.
In the past Andalusite was
sometimes called "poor man's alexandrite" because it offers color play
at a low price. But Andalusite is not really a color change stone. All of the
colors are there at the same time. Andalusite offers a lot of impact for a
relatively low price.