DETERMINATION OF MINERALS. 40% 
green, white. B.B. dark-colored varieties fuse easily, and give iron 
reaction, but emerald-green var. alincst infusible ; a white to yellow 
_ massive garnet is hardly determinable without chemical analysis. 
VESUVIANITE (lIdccrase), p. 261. H.=6°5 ; G.=8°S5-8-45 ; dimetric 
and often in prisms of four or eight sides, never fibrous ; brown to 
pale green, ywh, bk; B.B. fuses more easily than garnet ; reaction 
for iron. 
EPIDOTE, p. 262. H.=—6-7; G.—8-25-3°5; in moncclinic cryst. 
and massive, rarely fibrous ; unlike amphibole in having but one 
cleavage direction ; ywh green, bnh green, black, rdh, yellow, dark 
gray ; B.B. fuses with intumescence. 
AMPHIBOLE, dark varieties including hornblende, actinolite, and 
- other green to gray and black kinds, p. 249. H.=86; G.=3-3°4; 
monoclinic, in short or long prisms, often long fibrous, lamellar, ard 
massive, prisms usually four or six sides, 7A /=124;°, cleavage par. 
to J; B.B. fusion easy to moderately difficult. 
ANTHOPHYLLITE, p. 252, like hornblende; bnh gray to bnh 
green, sometimes lustre metalloidal; B.B. fuses with great diffi- 
_ culty. 
PYROXENE, augite, and all green to black varieties, p. 245. 
H. =5-6 ; G.=3°2-8°5 ; monoclinic, in shert or cblong prisms, lemel- 
lar, columnar, not often long, fibrous or esbestifcrm, prisms usually 
with four or ‘eight sides, JA J=87° 5’, cleavage par. to 1; B.B. es 
in hornblende. 
HYPERSTHENE, p. 244. H.=5-6; G.=—3°89; cryst. nearly as in 
pyroxene, but trimetric, usually foliated massive, also fibrcus; bnh 
green, gyh black, pinchbeck-brown ; B.B. fuses with more cr less 
difficulty. Bronzite, p. 244, is similar and almost infusible. 
IOLITEH, p. 264. H.=%7-7:5 ; G.=2°6-2'7 ; blue to blue violet ; lecks 
like violet-blue glass ; B.B. fuses with much difficulty. 
Tourmadne, uch Titanite, and Ilvaite (p. 268), B.B. give iron re- 
action, 
€. No reaction for iron. 
SCHEELITE, p. 212. H.=—45-5; G.—5°9-6'1; ywh, enh, rch, pale 
yellow ; lustre vitreous-adamantine ; fuses on the edges with great 
difficulty. 
SCAPOLITES, p. 268. H.=—55-6; G.=2°6-2°74; dimetric, often 
in square prisms ; white, gray, gnh gray ; B.B. fuses easily with in- 
tumescence. 
ZOISITH, p. 268. H.—6-6°5 ; G.=3-1-3: Ae trimeiric, oblong prisms 
and lamellar massive, cleavage i in only one direction, 
AMPHIBOLE, white var. (tremolite), p. 249. Same as for other 
amphibole (above), except in color ; B.B. fuses 
PYROXENE, white var., p. 215. Same as for other pyroxene (above), 
except in color ; B.B. fuses. 
ORTHOCLASE, p. 278. H.=6-6°5 ; G.=2°4-2°62 ; monoclinic, stout 
cryst., and massive, never columnar, two anequal cleavages, the 
planes at right angles with one another, and cleavage surfaces never 
finely striated, as seen under a pocket lens or microscope ; white, 
gray, flesh-red, bluish, green; B.B. fuses with some difficulty. 
