PENFIELDITE, A NEW MINERAL, 



Described in this number of A. J. S. by Dr. F. A. GENTH. 



This new anhydrous oxy-chloride of Lead occurs very rarely in small white, 

 hexagonal crystals in the ancient slag of the Laurium mines. It was collected 

 by Mr. English during his recent visit to Greece, at which time he exhaustively 

 examined all of the available slag. Not over a dozen specimens all told have been 

 discovered and the mineral will rank as one of the very rarest species. Customers 

 desiring specimens should apply to us by return mail. 



OTHER LAURIUM MINERALS. 



A very careful chemical examination has just been made of our rich stock of 

 the Laurium minerals formed by the action of the sea water on the slag of the 

 Laurium mines during the 2300 years since the age of Pericles. The labeling of 

 such specimens in the past by other mineralogists was so inaccurate that we feel 

 sure our customers will appreciate the efforts we have put forth at great expense 

 to have all our specimens absolutely correct. Among the Laurium species which 

 we can now supply are the following : Penfieldite (new), Fiedlerite, Laurion- 

 ite, Phosgenite, Anglesite, Cerussite, Selenite. All of these are admirably 

 suited for microscopic work. 



BEAUTIFUL PREHNITES FROM PATERSON. 



A new find of unusually choice specimens from Paterson, N. J. Delicate green, 

 very beautiful, crystallization well defined. The best Prehnites we have ever had 

 in stock. 



RADIATED RUBELLITE IN WHITE LEPIDOLITE. 



A most pleasing combination of these two pretty minerals in the many 'California 

 specimens we now have displayed. 



YELLOW AND RED WULFENITES. 



Several recent shipments from the Southwest supply the best yellow Wulfenites 

 we have ever had and some very good red Wulfenites both in loose crystals and 

 matrix specimens. 



SARDINIAN MINERALS. 



A very good fine of these rare minerals was secured by Mr. English during his 

 recent European tour and this has been recently enriched by a new shipment 

 giving us fine Phosgenites, Anglesites, Cerussites, Ullmannites, etc. 



A NEW SHIPMENT FROM ELBA. 



The immense stock of fine Elba minerals secured during Mr. English's week's . 

 visit to the great iron mines and the famous Tourmaline localities, was replenished 

 during August by another large addition. Fine Castorite crystals, Ilvaite crys- 

 tals and White Beryls, superb Hematite and brilliant Pyrite groups and 

 crystals, including many Pyrite twins. 



OTHER EUROPEAN MINERALS. 



"We have the largest and best stock of European minerals iu existence. Our 

 wonderful variety of such things as Hauerite, Meneghinite, Boleite, Sul- 

 phur, Vesuvian minerals, Baveno minerals, Carrara Quartz, St. Gott- 

 hard and Binnenthal minerals, 'Harz Mt. specimens, Scandinavian 

 rarities, etc., etc., is too well known by our customers to need further comment. 



^_ 100 pp. Illustrated Catalogue, 15c. ; cloth bound, 25c. ; Supplement, 2c. 

 Circulars free. 



GEO. L. ENGLISH & CO., Mineralogists, 



733 & 735 BROADWAY, 1VEW YORK CITY. 



