J. H. Pratt— Mineraloqical Notes. 429 



Art. LII. — Mineralogical Notes on Anthophyllite, Ensta- 

 tite and Beryl {Emerald) from North Carolina; by J. H. 

 Pratt. 



Anthophyllite. — In 1890, Prof. S. L. Penn'eld described a 

 single specimen of this mineral, which was reported as having 

 come from the Jenks corundum mine near Franklin, Macon 

 County, N. C. During the summer of 1892, while engaged 

 with the North Carolina Geological Survey, Prof. Pentield 

 and the author visited an outcrop of dunite, near Bakersville, 

 Mitchell County, and on breaking open one of the loose 

 bowlders of decomposed rock anthophyllite was exposed, which 

 Prof. Penfield at once recognized as identical with the speci- 

 men he had described. 



As there has been no mention of the correct locality of the 

 anthophyllite and as this name is often applied to an enstatite 

 occurring at the Jenks corundum mine, it has been thought 

 that a description of the occurrence of these two minerals 

 would be of interest. 



At the Woody Place, two and a half miles south of Bakers- 

 ville on the Marion road, there is a large outcrop of the rock, 

 dunite. The hillside where it occurs is quite barren and 

 thickly scattered with loose fragments and bowlders of the 

 altered dunite. The outcrop has been carefully examined, but 

 the anthophyllite has only been found in the bowlders. Here 

 it occurs in prismatic crystals imbedded in penninite. Nearly 

 all of the anthophyllite crystals are seamed and cracked, while 

 those near the outer part of the bowlders are somewhat decom- 

 posed and stained a dirty brown. The purest crystals are 

 transparent and vary from a pale clove-brown to a flesh-red 

 color. 



The crystals measure from 2 mm to 6 mm in the widest diameter, 

 and some were found that were over three centimeters in 

 length. A great many were examined, but no terminated ones 

 were observed. The unit prism, 110, occurring alone or in 

 combination with the brachypinacoid, 010, were the only 

 forms observed. 



An analysis of the anthophyllite by Dr. Baskerville* is given 

 below, together with the results obtained by Prof. Pentield. f 

 The two analyses are very similar and confirm Prof. Pen field's 

 conclusion that the specimen described by him was from the 

 Bakersville locality. 



Anthophyllite has been found at Corundum Hill, but it is 



*Of the Chemical Laboratory, N. C. Geological Survey, 

 f This Journal, xl, p. 396, 1890. 



