Geology and Mineralozy of Salisbury. 253 
Smoky Quartz—In amorphous masses. The best speci- 
mens are found in mica-slate, in which it forms veins of 
considerable thickness, and often exhibits a beautiful play of 
colors. 
Yellow Quartz—In rolled masses. 
Rose red Quartz—In detached pieces, color of different 
shades, tinged with yellow. 
Trised Quartz—Rare—colors produced by fracture, and 
a coat of metallic oxide. 
Milky Quartz—Common in large masses. 
Granular Quartz—Occurs in masses of considerable size, 
not met with as a rock. Many of the preceding varieties 
are céellular—cavites of various forms—appear to have 
been produced by the decomposition of other crystals. 
Ferruginous Quartz—Amorphous—beautiful specimens 
of an ochrey yellow, and deep red color are associated. 
Fetid Quartz-—Very abundant—resembles the common 
quartz, tinged with gray. Some specimens are so fetid 
that a single stroke of the hammer will nearly fill a room 
with the odour. i 
Siliceous Sinter—Abundant, investing the surface of 
Hornstone, in botryoidal concretions. 
Hornstone—Occurs in amorphous masses—one which 
I found weighed above a ton. It resembles that found in 
Litchfield, and has the same associations. 
Jasper—Of various colors, black, red, yellow, &c., in 
small rolled masses—sometimes of a slaty structure. Some- 
times it is met with in the shape of barbs for arrows; but 
hornstone and flint were more commonly employed by the 
Indians for this purpose. A few years since nearly a peck 
of these barbs of different sizes, and formed for different 
warlike weapons, were ploughed up at one time. They 
are very abundant in the north east part of the town. 
Staurotide—Associated with garnets in mica-slate—six 
sided prisms, two opposite planes broader than the oth- 
ers—summit diedral. The crystals often intersect each 
other at the usual angles of 60° and 120°. Sometimes 
three prisms cross, forming six equal angles, Crystals 
mostly small. 
Vion WER aud 3! 38 
