( »25 ) SECOND SUBSPECIES. i Tourmaline. T ourmalin.—Werner. Oolites-—Eleclricus turmalin, Wall. t. I. p. 329.—Schorl tr anfparent rhomboidal, R. d. L. t. 2. p. 344—Brafili- anischer turmalin, Wid. p. 2S 4 .-Tourmalme, Kino. *• X. p. 271.—Sorlo brafiliano, Nap. p. 150.—Tourma- W, lam. t . 2. p. 295 Le Schorl eleftnque, t. 1. P- 229 Tourmaline-vertcs et bleues, Hatty, t. 3. p. 31. External Chambers. Its principal colours are green and brown : from ^ek green it paffes into piftacio and olive green, into liver brown, and yellowifb and reddilh ^ r °wn, further into hyacinth red, crimfon red, violet due, azure blue, dark Berlin blue, and, laftly, into 'hdigo blue. Its colours are almoft all of them dark, often a little ITlu ddy, and when it is nearly opaque, on account of l ^ e darknefs of the colour, it appears black. ^ It occurs very feldom maffive, oftener in rolled P lec cs, but moft frequently cryftallizcd. I