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SALOON, liceous substance called hornstone^ divided into the 
-Nat^Hist. conchoidal and splintery varieties ; among these 
are the remarkable pseudomorphous crystals from 
Schneeberg in Saxony, derived from various modi¬ 
fications of calcareous spar, and generally referred 
to conchoidal hornstone; also some beautiful spe¬ 
cimens of wood converted into hornstone, being 
the luood-stone of Werner; hornstone balls, from 
Haunstadt in Bavaria.— Flinty-slate, &c. 
( Case 9.) In this case are deposited the difterent 
varieties or subspecies of jasper, such as they are 
enumerated by Werner, viz, the globular or Egyp¬ 
tian jasper, found chiefly near Cairo, in rounded 
pieces, which appear not to owe their form to roll¬ 
ing, but to be original and produced by infiltration ; 
the rihhon jasper, or striped jasper, the finest vari¬ 
eties of which are found in Siberia; the variously- 
tinted cominon jasper; the agate jasper, found only 
in agate veins ; the porcelain jasper, which is pro¬ 
duced by the agency of subterraneous fire.—In this 
case are also contained the substances constituting 
the obsidian tribe, to which belong the pitch-stone, 
w^hich is often confounded with semi-opal;—the 
pearl-stone, so called from its colour and the small 
globular concretions of which it is composed;—the 
obsidian, a remarkable variety of which is that found 
in globular pieces, at Ochotsk in Siberia,-near the 
small river Marekanka, from which it has obtained 
the name of Marekanite; pumice, which is not in 
all 
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