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UNISILICATES. 263 
Zoisiie. A mineral of the epidote group, occurring in trimetric crys- 
tals, with 7\ J—116° 40’, and having a white, pale-grayish, pale- 
greenish to reddish color; also massive. H.=—6-6°5. G.=3:1-38:4. 
It is a lime-epidote, with little or no iron. B.B. swells up and 
fuses to a white blebby glass ; after ignition, gelatinizes with hydro- 
chloric acid. T'hulite is a rose-red variety. Occurs at Saualpe in Carin- 
thia, in the Tyrol ; Arendal, etc.; in Vermont at Willsboro’ and Mont- 
pelier ; in Massachusetts, at Goshen, Chesterfield, etc.; in Pennsyl- 
vania at Unionville, and in Tennessee at the Ducktown copper mine. 
Saussurite, from the euphotide of the Alps in the vicinity of Lake 
Geneva, approaches zoisite in composition, it affording Hunt Silica 
43°59, alumina 27°72, iron sequioxide 2°61, magnesia 2°98, lime 19°71, 
water 0°35, soda 3°08 =100°04. Color whitish, greenish gray, ash-vray ; 
G.=3 226-3°385. H.=6°5-7. The saussurite of Orezza gave nearly the 
same composition in an analysis by Boulanger, and that of Schwartz. 
wald in general the same, with more of magnesia and less of lime, in 
an analysis by Hiitlin. The high specific gravity separates it from 
scapolite (wernerite) which it resembles in composition, and also from 
the feldspar group. 
Jadeite, one of the kinds of pale-green stones used in China for 
ornaments, called fediswi, has the high specific gravity of zoisite, but 
it has nearly the composition of oligoclase, if the iron and magnesia 
be excluded; analysis by Damour affording Silica 59°17, alumina 
22°58, iron protoxide 1:56, magnesia 1°15, lime 2°68, soda 12:°93— 10007. 
It is the material of some of the ornaments in the Swiss lake-dwell- 
ings. 
Allanite.—A cerium epidote, of a pinchbeck-brown to brownish- 
black and black color, submetallic to pitch-like and resincus in lustre, 
crystallizing in the monoclinic system, and with the angles nearly of 
epidote. H.—5'5-6. G.=—3-4°2. 
B.B. fuses easily and swells up to a dark, blebby magnetic glass. 
Most varieties gelatinize with hydrochloric acid, but not after igni- 
tion. Found in Norway, Sweden, Greenland, Scotland ; at Snarum, 
near Dresden ; in Massachusetts, at the Bolton quarry ; in New York, 
at Moriah in Essex County, Monroe in Orange County ; in New Jersey, 
at Franklin ; in Pennsylvania, at East Bradford and Eaton ; in Vir- 
ginia, Amherst County ; in Canada, at St. Paul’s. 
Orthite isa variety in long slender crystals. Muromontite, Bodenite, 
and Michaelspnite are related minerals. 
Gadolinite. A mineral of a greenish-black color, containing lithium, 
cerium, and barium, from Sweden, Greenland, and Norway. Crystals 
monoclinic, with /A /=116°. H.=6°5-7. G.=4-4'5. 
Mosandrite. Reddish-brown to dull greenish or yellowish-brown 
silicate of cerium, lanthanum and didymium, calcium, and titanium. 
H.=4. G.=2-9-3:03. From Brevig, Norway. 
LIiwaite (Yenite). In trimetric striated prisms, of an iron-black to 
grayish-black color.. JA /=112° 38’. H.=5°5-6. G.=8-7-42. In 
composition a calcium-iron silicate in which part of the iron is in 
the sesquioxide state. From Elba; Fossum and Skeen in Norway, 
etc. Also reported as occurring at Cumberland, R. I., and Milk Row 
quarry, in Somerville, Mass. ‘The name Jlvaite is derived from the 
Latin name of the Island of Elba, 
