528 MINERALS. 



Specular Iron is but a variety of hematite, and is described above under micaceous iron ore. The 

 celebrated Iron Mountain, and Pilot Knob of Missouri, are composed of this ore. It is found in Vermont 

 at Chittenden, Milton, Enosburgh and Plymouth. In the State Cabinet it can be found under Nos. 62, 

 63 and 64. 



Anthophyllite. A variety of hornblende in long, slender, clove-brown crystals, somewhat radiating. 

 Found in Plymouth and Grafton, and may be seen in the Collection, under Nos. 197 and 198. 



Rhodonite, Manganese Spar or Bisilicate of Manganese, is composed of silica, oxyd of manganese, a 

 little lime, and in a few specimens a trace of magnesia and iron. Its primary form is an oblique rhombic 

 prism. Generally it is found massive, of a pink or rose-red color, sometimes dull brown. It is sometimes 

 cut by the lapidary and used for inlaid work. It has been found in Vermont at Topsham, Coventry and 

 Irasburgh. 



Pyrolusite, Mispickel and Hornblende, have been described under Calciferous Mica Schist. 



Chrysolite. This is generally found in grains in volcanic rocks, but its primary crystalline form is a right 

 rectangular prism. It is of a light-green color, generally very brittle, and is found in very small masses. 

 Its composition is a silicate of magnesia, iron, alumina and manganese. The specimens found in Vermont 

 were discovered at Thetford, Norwich and Cavendish Falls. It may be seen in the Cabinet under Nos. 254 

 and 255. 



Epidote. (Described under Calciferous Mica Schist.) 



Brucite. A small quantity of a mineral, apparently bracite, has been found at Roxbury. But as no 

 chemical analysis has been made of it, it is not fair to speak with certainty concerning its occurrence there 

 simply from its physical characters. 



lied Hematite, has been described under Specular and Micaceous Iron. 



Heavy Spar, or Sulphate of Baryta. Occasionally containing a little silica, oxyd of iron and alumina as 

 impurities. Celestine is also a common impurity. Its primary form is that of a right rhombic prism. The 

 prevailing color is white. One crystal (tabular) was found at Dufton, England, a few years since, weighing 

 forty-two pounds, which was perfectly transparent. Barytes is used as a pigment when ground to a powder. 

 It is used either alone or adulterated with white lead to the extent of 25 to 33 per cent. It is of some use 

 as a pigment on surfaces exposed to sulphureted hydrogen, since it does not turn black. It has been found 

 in Richford, Vt. 



Amianthus. (See Asbestus above.) Amianthus has been found in Vermont at Troy, Jay, Lowell and 

 Weybridge. Specimens 219, 220 and 221 in the Cabinet represent this mineral. 



Wad. (Described under Calciferous Mica Schist.) 



Kerolite. This occurs not in crystalline forms but in mammillary or botryoidal incrustations or seams in 

 serpentine. It is white with an occasional tinge of yellow or green. Its composition is water, silica, mag- 

 nesia and occasionally oxyd of iron and alumina. It is also known as Deweylite. It has been found at 

 Lowell, Vt. 



Psilomelane. (Described under Calciferous Mica Schist.) 



Eaphilite. A variety of hornblende. In the language of Prof. Dana " an asbestiform tremolite." Prof. 

 Shepard describes it as consisting of " grayish or bluish-white, long, radiating, fibrous mass, of high luster, 

 and graduating into common sahlite. It has been found in Vermont at Waterford, in a bowlder. Per- 

 haps it came from Lanark and Perth, Canada, where it has previously been discovered. It is No. 204 in 

 the State Collection. 



Pyrope. This mineral is regarded by Prof. Dana as a separate species, but by Prof. Shepard as simply 

 a variety of garnet. At least the differences are slight. It has been found at Rockingham, and can be 

 seen in the Cabinet under the Nos. 251 and 252. 



Natrolite. A specimen of what seems to be natrolite has been found at Newfanc, and may be seen 

 in the Collection No. 322. A more thorough investigation and a further collection of specimens are 

 necessary to verify the species. 



Pimelite. This is an earthy mineral (sometimes massive), "occurring disseminated and in coatings; 

 often prehemlcnt. Fades somewhat on exposure to air and light. Composed essentially of silicate of 

 nickel. Found at Newfane, of which specimens may be seen in the Cabinet under Nos. 325 and 326. 



