	*Sinkankas, John (1959) Gemstones of North America* Vol. 1. Van Nostrand Reinhold Co., New York.**	Book (volume)
	that data up to the end of 1974. John Sinkankas San Diego, California July, 1975 JOHWSTUPAW.N19,901...the Southern Gem and Mineral Company of El Paso, Texas. Information on the Virgin Valley opal deposits...region; the Southern Onyx and Marble Company of San Diego, California, furnished information and a photograph...L. Mahaffey of Nevada, Missouri. The well-known Texas agate localities of the Alpine Region were described...of the Kobuk jade locality. Descriptions of San Diego County, California, gemstones and the mines in which
	*(1938) Lexicon of geologic names of the United States (including Alaska) Bulletin* Vol. 896. US Geological Survey doi:10.3133/b896**	Report (volume)
	5 in., inch or inches. Circ., Circular. Co., County or Company. Indus., Industrial. Inst., Institute...Conf. Guidebook, pp. 94, 96). [See under Bachelor Creek is. On p. 21 Aarde sh. is described as consisting...containing Nodaway coal. The underlying Bachelor Creek Is. also interfingers in Severy sh., he stated....Geol. Surv. Bull. 22, pp. 39, 205-207). Bachelor Creek ls. is basal memb. of Howard Is. in southern Kans...porphyry. Is well exposed at many places along Aaron's Creek [Person and Granville Counties, N. C.]. Assigned
	*(1966) Lexicon of geologic names of the United States for 1936-1960. Bulletin* Vol. 1200. US Geological Survey doi:10.3133/b1200**	Report (volume)
	Underlies Church limestone member; overlies Bachelor Creek limestone member. M. R. Mudge, C. P. Walters, and...Bull. 1060-D, p. 193, 252-253, pl. 7. In Nemaha County, Kans., member is basal unit of Howard limestone...Aarde farm, sec. 4, T. 26 S., R. 11 E., Greenwood County. Aaron Slatet Precambrian or Paleozoic: Central...Precambrian. Well exposed at many places along Aaron's Creek, Person and Granville Counties, N.C. Abbott Formation...Babylon sandstone, Manley coal, Tarter coal, Pope Creek coal, and Bernadotte sandstone. Report presents
	*Overstreet, William C. (1967) The geologic occurrence of monazite. Professional Paper* 530. US Geological Survey doi:10.3133/pp530**	Report (issue)
	Perce Counties __________ _ Idaho CountY-----------------Valley CountY-----------------Adams, Payette,...and Gem Counties ________________________ _ Boise County ___ --------------Ada, Owyhee, Elmore, and Custer...Spruce Pine district ____________ Madison County and Haywood County _____________________ _ Zirconia district...monazite belt in the Piedmont province __ Stokes County and Surry County_ Wilkes, Alexander, Catawba, Caldwell...Rutherford County and Cleveland County __ --------------Lincoln County and Gaston County _____________________

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Chalcedony from Hinton Creek, San Saba County, Texas, USA

Chalcedony from
Hinton Creek, San Saba County, Texas, USA