1873.] OUO [Genth. 



" Narrow veins containing, besides the chlorite and corundum, a dark- 

 blackish-green spinel, more or less mingled with black tourmaline, tra- 

 verse the layers 4 and 5 in various directions." 



From Col. Jos. Willcox I have obtained some additional information. 

 He states that the chlorite schist is much decomposed even to a depth of 

 fifty or sixty feet, and the corundum in the same easily falls into frag- 

 ments. The chlorite schist strikes northeast and southwest. At right 

 angles to it a vein of chlorite several feet wide has been uncovered, which 

 contains the large crystals of corundum, which also fall readily into frag- 

 ments. A small vein of much decomposed albite, containing small 

 crystals of corundum, passes through the chlorite. At the same place 

 small crystals of corundum are occasionally found in black tourma- 

 line. Associated with the minerals already named are actinolite, asbes- 

 tus talc, etc. 



From Prof. Shepard's paper and the private communications of Rev. 

 C. D. Smith and Col. Jos. Willcox, I gather the following information 

 with reference to the Cullakanee or Buck Creek and the Shooting Creek 

 localities, both in Clay County. 



About twenty miles southwest from the Culsagee Mine near Buck 

 Creek, in Clay County, is the so-called Cullakenee Mine ; the outcrop of 

 the chrysolitic rock covering an area of about 300 acres. Corundum is 

 here found in boulders in many places. The chrysolite contains the 

 usual associates of the serpentine localities, such as actinolite, picrolite, 

 etc., and is already partly changed into serpentine. Near the middle of 

 this chrysolite bed is an outcrop of a very peculiar rock, resembling the 

 omphacite of Hof, Bavaria, and consisting of green smaragdite,* a 

 white triclinic feldspar and highly colored grains of ruby, sometimes 

 also intermixed with small quantities of cyanite and chromite. The 

 corundum at the Cullakenee Mine is generally of a grayish-white, or pale 

 ash-gray color, rarely with specks of sapphire through it ; sometimes 

 also of a beautiful pink color, and is associated with andesite, zoisite, 

 margarite, hornblende, and rarely .with chlorite, spinel and tourmaline. 

 A peculiar white or grayish-white scaly mineral in flattened masses with 

 a nucleus of corundum rarely occurs, which is described under the name 

 willcoxite. 



About ten miles southwest of Cullakenee, near Shooting Creek, Clay 

 County, corundum is again met with, and for five or six miles from this 

 place extending into Towns County, Georgia, it is found at many places 

 associated with chlorite, and probably smaragdite ; the chrysolite lying 

 between beds of hornblendic gneiss. 



The Rabun County, Georgia, localit} r much resembles that of the Cul- 

 sagee Mine near Franklin, North Carolina, and the corundum which I 

 have seen from there can hardly be distinguished from the latter. 



Near Gainesville, Hall County, Georgia, occurs a very peculiar variety 

 of corundum. For the information about this locality and the specimens 



* See below. 



