SCHILLElt SPAR. 14C 



3-6, (Clemson.) Infusible. Affords a transparent bead with borax, 

 Acted on by the acids when pulverised. Occurs in limestone with ser- 

 pentine at Amity, N. Y. It was named in honor of De Witt Clinton 

 It has also been called Seybertite. 



Xanthophyllite is considered by Rose, its describer, as identical with 

 Clintonite. 



Pennine. Near chlorite ; occurs in hexagonal tables, secondary to 

 a rhombohedron of 118°. From the Pennine Alps. 



Picrosminc. A green or greenish-white mineral, either fibrous like 

 asbestus, or in rectangular prisms. H=2'5 — 3. Gr=2*59 — 27. Gives 

 out water when heated, and has an argillaceous odor when moistened 

 with the breath. Near serpentine in composition. From an iron mine 

 in Bohemia. 



Monradite is a cleava.ble yellowish mineral near picrosmine in com- 

 position. 



Retinalitc. A massive mineral, having a resinous appearance, found 

 with and allied to serpentine. From Granville, Upper Canada. 



Dermatine. Occurs massive, reniform or in crusts on serpentine, of a 

 resinous luster and green color. Feel greasy. Odor when moistened 

 argillaceous. 



Villarsite. Occurs in yellowish rhombic octahedrons in dolomite at 

 Traversella, in Piedmont. Allied in composition to serpentine. 



Antigorite. A brownish or leek green mineral, in foliated masses and 

 resembling Schiller spar. 



Spadaite. A flesh-red mineral, near Schiller spar. 



Pyrallolite. A white or greenish cleavable mineral, dull and a little 

 resinous in luster. Becomes black and then white again before the 

 blowpipe, whence the name, from the Greek pyr, fire, alios, other, and 

 lithos, stone. From Pargas, Finland. It is altered ausrite. 



Pyrosclerite. A hydrous silicate of magnesia and alumina, of a light 

 green, violet or grayish color, soft, and often foliated or micaceous. 

 Kcemmererite is a violet variety of this mineral. Occurs in the Urals, 

 at Unst in the Shetlands, at Texas in Pennsylvania. 



Pyrophyllite. Foliated and pearly like talc ; plates more or less 

 radiating ; very soft. Color white or greenish. It swells up and spreads 

 out in fan-like shapes before the blowpipe. Occurs in the Urals. 



Vermiculite is probably identical with pyrosclerite. It looks and 

 feels like steatite ; but when heated before the blowpipe, worm-like 

 projections shoot out, owing to a separation of the thin leaves composing 

 the grains, arising from the vaporization of the water present. Occurs 

 at Milbury, Massachusets. 



Periclase. Occurs at Vesuvius in small transparent octahedrons, 

 and is pure magnesia. Luster vitreous ; nearly as hard as feldspar. 

 Gr=375 



Steatitic pseudomorphs. Pseudomorphous crystals often consist of a 

 kind of steatite. A pseudomorph of this kind from Warwick, N. Y:, 

 having the form of hornblende, but so soft as to be easily cut with a 

 knife, afforded Beck, silica 34"7, alumina 25'3, lime 51, magnesia 252, 

 water 9'1. These crystals have been produced by a change of the 

 original hornblende. Others have the form of spinel, &c. 



The Eensselaerite of Emmons is believed to be a steatitic pseudo- 

 morDh. or altered pyroxene. 



13* 



