MINERALS 



399 



general information upon this subject. " The mine- 

 ralogy of the United States," says he, " "will not 

 supply an extensive theme, as few substances are 

 found, except those which are, indeed, the most 

 precious to industry, iron and coal." 



It is apprehended that, deficient as our knowledge 

 is, with regard to the subject, it will be seen how 

 incorrect is his opinion. 



Qwfl:7'/r.... Several varieties of quartz are found in 

 most of the states. In New York it composes in part 

 the granites, and is of three colours ; white, half 

 clear, and reddish. It is found either in a separate 

 form, or variously compacted and combined with 

 feldspar, glimmer, schoerl, and granite.* Pennsyl- 

 vania, near West Chester, affords a variety of a 

 dark blue colour, which has considerable lustre, and 

 as far as we know, is not common in Europe. 



Elegant Rock Chrystals are found in different 

 parts of Pennsylvania, especially near Bethlehem ; 

 in Maryland, Virginia, Kentucky, South Carolina,! 

 and New Hampshire:!:, many of which are trans- 

 parent, and beautifully truncated at the terminations. 



Amethystine quartz^ is found in Pennsylvania and 

 Virginia. 



Large masses of Amorfihous^ smoky tofiaz^ are 

 found in Pennsylvania. 



• Agate has been found in Greenbriar county, Vir- 

 ginia. 



Common Flint is found on the banks of the rivers 

 Neshaminy and Susquehannah, and in Virginia. 



• Dr. Mitchell. 



t Drayton's View of South Carolina. 

 X Belkixap, vol. 3d. 



