Extra Rare Selenium Minerals 



Crookesite has always ranked as one of the rarest of 

 rare minerals, being found sparingly in but one locality 

 in Sweden. It is a selenide of copper, Thallium (!) and 

 silver. We now have twenty good specimens at 50c. to 

 $20 00, some of them showing associated Berzelianite, 

 another very rare selenide of copper. Several specimens 

 of the rare selenide of copper and silver, Eucairite, are 

 also in stock. 



OTHER VERY RARE MINERALS. 



A few other very rare minerals in stock just now are 

 worthy of mention : Livingstonite, Frieseite, Wapplerite, 

 Tellurite, Cenosite, Marshite, Rasp'ite, Pyroaurite, Aphthitalite, Connellite, Whe- 

 wellite. Aguilarite, Sulfoborite. 



NATIVE LEAD FROM FRANKLIN. 



A few specimens have just come in from Franklin Furnace. 



LOOSE CRYSTALS OF SPHALERITE. 



200 uncommonly good loose crystals of Sphalerite, 5c. to 25c. 



A LARGE ENGLISH IMPORTATION. 



The growing scarcity of all of the English minerals has persuaded us to lay in 

 an abundant stock while yet it is possible to obtain them. Most of the English 

 iron mines are now closed and the prospect is that the matchless Fluorites, 

 Barites, Calcites, etc., for which they have so long been noted, will become as 

 scarce as the fine Arizona red Wulfenites. once so abundant. Several thousand 

 choice specimens have just arrived. The descriptions given in our Spring Bulle- 

 tin apply in general to this importation. 



SICILIAN SULPHURS. 



Every specimen in the consignment advertised last month is sold. 



SUTTROP MILKY QUARTZ CRYSTALS. 



We now have on sale the best collection we have ever seen of these model-like 

 crystals, a new lot having arrived during April. 5c. to 25c. 



DOMEYKITE. 



A $12.50 specimen from any of the old localities is not as good as one at 15c. 

 from the Mohawk Mine. Our stock is unrivaled. 



Stibiodomeykite, a new antimonious variety, 35c. to $2.50. 

 MohaivJcite, a new arsenide of copper, nickel and cobalt, 50c. to $3.50. 



IRIDESCENT PYRITE CONCRETIONS. 



Strikingly beautiful specimens, 25c. to $2.00. A new find in New Jersey. 

 OUR SPRING BULLETIN. 



24 pages, 29 illustrations, will be sent free to anyone desiring it. It describes 

 many other recent additions to our stock and gives a complete list of Mineralogi- 

 cal Books. 



124-page Illustrated Catalogue, giving Dana Species number, crystal system, 

 hardness, specific gravity, chemical composition and formula of every mineral, 

 25c in paper. 



44-page Illustrated Price-Lists, also Bulletins and Circulars, free. 



GEO. L. ENGLISH & CO., Mineralogists, 

 Dealers in Scientific Minerals, 



Removed to 3 and 5 West 18th Street, First door west of Fifth Avenue, New York City, 



