Even if the Andalousite has a nice color and a good hardness she is not often used in jewelry.
The Andalousite has the same chemical formula as the Kyanite and the Sillimanitebut not the same system.
The Andalousite has a high pleochroism. And depending of the light, the Andallousite shows different colors, from yellowish-green to reddish threw different tones of brown.
The gem andalousites flawless are rare.
e rose à blanche, qui une fois coupée perpendiculairement au cristal montre une inclusion en forme de croix (Carbone) se nomme la chiastolite ou « pierre de croix ».
To learn more about the mineralogy of the andalousite, see Mindat.ord