390 JOURNAL Olf the; WASHINGTON ACADEMY OF SCONCES VOL. 11, NO. 16 



ites of the variety itacolumite. When fresh its azure blue color, 

 vitreous luster, indistinct cleavage, and hardness (5-6) are the more 

 important megascopic properties. It is sub translucent to opaque, 

 and has a specific gravity of 3 =^ . 



The known occurrences of lazulite in the United States are limited 

 to North Carolina, South Carolina, and Georgia in the southeast 

 Atlantic States, ^ and to California on the Pacific coast. 



The localities are Graves Mountain, Lincoln County, Georgia; 

 Chesterfield district. South Carolina ; Clubb and Crowder Mountains, 

 Gaston County, and Sauratown, Stokes County, North Carolina. 

 The largest number of occurrences is in California, where the mineral 

 has been reported from the following localities:^ Breyfogle Canyon 

 in Death Valley, Inyo County; San Gabriel Mountain, Los Angeles 

 County; near Mono Lake and in Green Creek Canyon near Bodie, 

 Mono County; and Oceanside, San Diego County. Foreign occur- 

 rences of lazulite have been reported from localities in Austria, 

 . Switzerland, Sweden, Brazil, and Canada.^" 



Probably the first occurrence of lazulite noted in the United States 

 was by H. S. Hunter in 1822, near Crowder Mountain in the southern 

 part of Lincoln (now Gaston) County, North Carolina. The mineral 

 was found later in greater abundance near the southern end of Clubb 

 Mountain, about 30 miles northeast of Crowder Mountain. Its 

 occurrence in the North Carolina and Georgia localities is in Cambrian 

 quartzite, as crystals and crystal aggregates irregularly distributed 

 through the rock, usually in nests or bunches. With the exception 

 of corundum, which is unknown in the Georgia locality,- the mineral 

 associates of lazulite in the two states are the same. They include 

 rutile, cyanite, pyrophyllite, quartz, and damourite. The mineral 

 association in the Chesterfield district. South Carolina, is, according 

 to Genth,^^ pyrophyllite and cyanite. 



Unlike the occurrences of lazulite in the Carolinas and Georgi a 



8 C. L. Hunter. Amer. Journ. Sci. 15: 376-377. 1853. J. L. Smith and G. J. Brush. 

 Amer. Journ. Sci. 16: 370. 1853. C. U. Shepard. Am. Journ. Sci. 27: 36-39. 1859. 

 F. A. Genth. Amer. PhiL Soc. 13: 367, 382, 383, 404-405. 1873. E. S. Dana. A 

 system of mineralogy (1900), p. 799. G. F. Kunz. N. C. Gaol. Survey BuU. 12: 57. 1907. 

 T. L. Watson and J. W. Watson. Univ. of Virginia. PubL BuU. Phil. Soc, Sci. Ser., 

 211-214 (No. 7). 1912. 



9 A. F. Rogers. Sch. of Mines Quart. 33: 375. 1912. D. B. SterrETT. U. S. Geol. 

 Survey, Min. Res. for 1911. Pt. II, p. 1060. A. S. Eakle. Calif. State Mining Bureau, 

 Bull. 67: 162. 1914. 



i" For more details of foreign localities see E. S. Dana, loc. cit. 

 11 F. A. Genth. Amer. Journ. Sci. 18: 410. 1854. 



