and a lusite

& a. [From And alus i a, in Spain, where it was first found; and -ite λιθος ( lithos ) = stone.] A. As substantive: A mineral cla ed by Dana with his Sub silicates. It is orthorhombic. The hardne in typical specimens is 75, but in some opaque kinds only 3-6. Its sp. gr. 3-1 to 3-2, 3-05 to 3.35; its lustre vitreous; its colour whitish-red, flesh-red, violet, pearl-gray, reddish-brown, or olivegreer. There is strong double refraction, The composition is silica, 33 to 40-17; alumina, 50-90 to 619; sesquioxide of iron, 0:30 to 571; sesquioxide of manganese, 0:53 to 0.83; magnesia, 0:17 to 1'14; lime, 0-21 to 412; soda, 01C; pota a, 0:30 to 150; water, 0-25 to 260. Dana divides andalusite into "Var. 1. Ordinary; 2, Chiastolite (macle)." Andalusite is found in argillaceous schist, in gnei , in mica-schist, and rarely in serpentine. It is Bometimes allied to kaolin, to mica, or to cyanite. It occurs at And alus i a in Spain, in Germany, Austria, France, and Ru ia; at Killincy Bay, near Dublin, in Ireland; near Ballachulish, in Scotland; and at Cumber. land in England. Myelin has the composition of cyanite and andalusite. B. As adjective : Dana has an Andalusite group of minerals defined as anisometric, containing only sesquioxides. It includes andalusite, fibrolite, kyanite, and topaz,