SOUTH DAKOTA MINERALS. 



A personal trip to the Black Hills region and work done by our own special 

 collector at numerous localities places on sale tlie following ; 



ATJTUNITE. Showy specimens exhibiting bright yellow crystalline 

 scales coating the rock. 



JAMESONITE. Bright metallic masses of characteristic bladed struc- 

 ture. Lowest prices recorded for the species. 



BINDHEIMITE. Yello.wish masses associated with above. 



MELANTEE-ITE. Solid fibrous masses of bluish green color. 



AKTDALTJSITE. Large well defined crystals, single and grouped. 



"MODEL" SELENITE. Widely 'known from Ohio. The new crys- 

 tals are different in one important respect — they are three or four sizes larger 

 than the old. A varied stock of extra selected quality 4 to 6 inches long. 

 Several types. 



SPODUMENE. Large rectangular cleavages. 



COLUMBITE. A few good crystallizations. 



"DIAMOND MICA." Ehomb-like cleavages and crystals of Muscovite 

 of striking aspect. 



IRIDESCENT LIMONITE. The most astonishing combination of 

 colors to be found outside of a Pike's Peak colored photo. 



ORTHOCLASE. Simple crystals and Oaidsbad twins of exceptionally 

 sharp angles. 2 to 3 cm. diameter. Loose and in matrix. 



"DEVILS HILL SAND CRYSTALS." 



(Calcites containing about 64^ of sand.) 



Our collector made a ten-day trip to the locality, far from the railroads in 

 the Pine Ridge Indian Reservation. These remarkable crystals have been 

 investigated crystallographically by Prof. S. L. Penfield (this Journal) and 

 their mode of "occurrence described by Prof. E. H. Barbour (Bull. Geol. 

 Soc. Am.) 



The locality was well worked and only the best portion of the crystalliza- 

 tions handled were saved. By far the largest lot ever brought from the 

 locality was shipped. It embraces the loose doubly terminated steep 

 hexagonal pyramids as well as hundreds of clusters and concretions of the 

 same, 2 to 10 inches diameter. The low prices include but one profit. They 

 have not been handled by two dealers, as was a lot formerly retailed. 



64-PAGE "COLLECTIOIV CATALOG". 



Numerous full-page photo-engravings. 

 Gives prices and descriptions of, — 



Minerals for study and reference arranged in systematic collections. 



Sets of ores for prospectors. 



Detached crystals for measurement. 



Series illustrating hardness, color and other physical characters. 



Laboratory minerals sold by weight. 



Sundry supplies. 



MAILED EREE TO ANY ADDRESS. 



The largest and most complete stock of Scientific and Educational 

 Minerals in the world. Highest awards at Nine Expositions. 



FOOTE MINERAL CO., 



■ I'ORMERLT DR. A. E. FOOTE. 



PHILADELPHIA, PARIS, 



1317 Arch Street. 24 Rue du Champ de Mars. 



