Yogo sapphire (English Wikipedia)

Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. "Corundum" (PDF). Handbook of Mineralogy. Vol. 3. Chantilly, VA: Mineralogical Society of America. ISBN 978-0-9622097-2-7. Retrieved December 5, 2011. Note: sapphire is a color variety of corundum.
Meyer, Henry O. A.; Mitchell, Roger H. (1988). "Sapphire-Bearing Ultramafic Lamprophyre from Yogo, Montana: A Ouachitite" (PDF). Canadian Mineralogist. 26. Vancouver, BC: Mineralogical Association of Canada: 81–88. Retrieved December 19, 2011.

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Paladin, Vivian A. "Facts and Reflections About Charles M. Russell". Art Montana. Retrieved November 6, 2011.

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Ward, Jane R.; Attaway, Nancy L. "Yogo Sapphires". Attaway Gems. Retrieved December 5, 2011.

bigskyjournal.com

Moser, Cathy (Spring–Summer 2009). "Yogo City or Bust". Big Sky Journal. Bozeman, MT: Jared Swanson. Archived from the original on April 25, 2012. Retrieved October 24, 2011.

blackpast.org

Behan, Barbara C. "Ringold, Millie (1845–1906)". Black Past. Retrieved November 2, 2011.

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Weed, Walter Harvey; Pirsson, Louis Valentine (1900). Geography of the Little Belt Mountains, Montana. Washington, DC: United States Geological Survey, Government Printing Office. pp. 317–331, 396–400, 447–459, 471, 476, 486, 494, 502–504, 556, 568, 576. Retrieved October 29, 2011.
McRae, W. C.; Judy, Jewell (2009). Montana. Berkeley, CA: Avalon. p. 339. ISBN 978-1-59880-014-2. Retrieved October 29, 2011.
Read, Peter G. (2005). Gemmology (3 ed.). Oxford: Elsevier Ltd. pp. 49–51. ISBN 0-7506-6449-5. Retrieved April 22, 2012.
Hughes, Richard W. (2006). Gems: Their Sources, Descriptions and Identification (6 ed.). Oxford: Butterworth-Heinemann. pp. 123, 144–146. ISBN 978-0-7506-5856-0. Retrieved October 29, 2011.
Kunz, George F. (December 1897). Kuna, Edward S (ed.). "Article 44: On the Sapphires From Montana, with special reference to those from Yogo Gulch in Fergus County". American Journal of Science. 4 (24). New Haven, CT: Yale University Department of Geology and Geophysics: 417–420. doi:10.2475/ajs.s4-4.24.417. Retrieved October 29, 2011.
Pratt, J. H. (1897). Kuna, Edward S (ed.). "Article 46: On the crystallography of the Montana Sapphires". American Journal of Science. 4 (24). New Haven, CT: Yale University Department of Geology and Geophysics: 424–428. doi:10.2475/ajs.s4-4.24.424.
Pirsson, L. V. (1897). Kuna, Edward S (ed.). "Article 45: On the Corundum-bearing Rock From Yogo Gulch, Montana". American Journal of Science. 4 (24). New Haven, CT: Yale University Department of Geology and Geophysics: 421–423. doi:10.2475/ajs.s4-4.24.421. Retrieved October 29, 2011.
Sterrett, D. B. (1908). Mineral Resources of the United States, Calendar Year 1907, Part II Non-Metallic Products. Washington, DC: United States Geological Survey, Government Printing Office. pp. 816–819. Retrieved October 29, 2011.
Roberts, Albert E. (1979). Paleotectonic Investigations of the Mississippian System in the United States: Part One: Northern Rocky Mountains and Adjacent Plains Region. Washington, DC: United States Geological Survey, Government Printing Office. p. 225.
Taliaferro, John (1996). Charles M. Russell: The Life and Legend of America's Cowboy Artist (2003 Red River Books ed.). Norman, OK: University of Oklahoma Press. pp. 34, 40. ISBN 978-0-8061-3495-6. Retrieved October 31, 2011.
Board of Regents (1901). Annual Report of the Board of Regents of the Smithsonian Institution for the Year Ending June 30, 1899. Washington, DC: Government Printing Office. p. 32. Retrieved November 13, 2011.
Johnston, William R. (1999). William and Henry Walters: The Reticent Collectors. Baltimore, MD: Walters Art Gallery. p. 271. ISBN 978-0-8018-6040-9. Retrieved November 10, 2011.
Feldman, Robert (2006). Rockhounding Montana (2 ed.). Kearney, NE: Morris Book Publishing. p. 8. ISBN 978-0-7627-3682-9. Retrieved April 23, 2012.

carleton.edu

serc.carleton.edu

"Field Guide, Little Belt Mountains". Science Education Resource Center, Carleton University. Retrieved October 29, 2011. Note: Click map.

crevoshay.com

Crevoshay, Paula (February 2007). "Conchita – Inspiration and Process". Crevoshay. Archived from the original on November 9, 2011. Retrieved November 13, 2011.

distinctlymontana.com

Gibson, Richard I. (Summer 2011). "Yogos: Montana's 'Goldilocks' Gem". Distinctly Montana. Bozeman, MT: Star Ridge Publishing LLC. Archived from the original on March 25, 2013. Retrieved June 22, 2013.

doi.org

Kunz, George F. (December 1897). Kuna, Edward S (ed.). "Article 44: On the Sapphires From Montana, with special reference to those from Yogo Gulch in Fergus County". American Journal of Science. 4 (24). New Haven, CT: Yale University Department of Geology and Geophysics: 417–420. doi:10.2475/ajs.s4-4.24.417. Retrieved October 29, 2011.
Pratt, J. H. (1897). Kuna, Edward S (ed.). "Article 46: On the crystallography of the Montana Sapphires". American Journal of Science. 4 (24). New Haven, CT: Yale University Department of Geology and Geophysics: 424–428. doi:10.2475/ajs.s4-4.24.424.
Harlan, Stephen S. (1996). "Timing of Emplacement of the Sapphire-Bearing Yogo Dike, Little Belt Mountains, Montana". Economic Geology. 91 (6). Littleton, CO: Society of Economic Geologists via George Mason University Academic Research System: 1159–1162. Bibcode:1996EcGeo..91.1159H. doi:10.2113/gsecongeo.91.6.1159.
Pirsson, L. V. (1897). Kuna, Edward S (ed.). "Article 45: On the Corundum-bearing Rock From Yogo Gulch, Montana". American Journal of Science. 4 (24). New Haven, CT: Yale University Department of Geology and Geophysics: 421–423. doi:10.2475/ajs.s4-4.24.421. Retrieved October 29, 2011.

findlaw.com

codes.lp.findlaw.com

"Mont Code Ann § 1-1-505 : Montana Code - Section 1-1-505: State Gem Stones". Find Law. Retrieved June 21, 2013.

gemgallery.com

"Montana Sapphires – Gemology". Gem Gallery. Retrieved October 29, 2011. Note: Includes map of major Montana sapphire mines.

gemstones-guide.com

"Corundum, Rubies, Sapphire". Gemstones-Guide. CIRCA. Retrieved June 4, 2012.

harvard.edu

ui.adsabs.harvard.edu

Harlan, Stephen S. (1996). "Timing of Emplacement of the Sapphire-Bearing Yogo Dike, Little Belt Mountains, Montana". Economic Geology. 91 (6). Littleton, CO: Society of Economic Geologists via George Mason University Academic Research System: 1159–1162. Bibcode:1996EcGeo..91.1159H. doi:10.2113/gsecongeo.91.6.1159.

jewelersethicsassociation.com

Elliott, Thomas B. (May 2, 2011). "Montana Sapphire Vs. Yogo Sapphire". Jewelers Ethics Association News. 3 (8). Washington (state): Jewelers Ethics Association. Retrieved October 29, 2011.

libertinejewelry.com

"Crevoshay, Kane Present Sapphire Treasure to Smithsonian" (PDF). Libertine Jewelry. May 7, 2007. Retrieved November 13, 2011.

montanakids.com

"State Gemstones Sapphire and Agate". Montana Office of Tourism. Retrieved November 6, 2011.

mt.gov

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"Descriptions – County Boundaries" (PDF). Montana Legislature. p. 22. Retrieved November 5, 2011.

nris.mt.gov

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deq.mt.gov

"Abandoned Mines Historic Context". Montana Department of Environmental Quality. Archived from the original on January 1, 2012. Retrieved November 6, 2011.

nationalmap.gov

edits.nationalmap.gov

"Yogo Creek, near Yogo Gulch". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved April 25, 2012.

proquest.com

search.proquest.com

Sanko, John J. (February 3, 1984). "Sapphires Gaining Popularity: Princess Diana Sets off Jewelry Trend". Los Angeles Times. United Press International. p. F12. ProQuest 153765547. (subscription required)

russellcountry.com

Skornogoski, Kim (July 4, 2010). "Yogo Sapphires". Russell Country. Retrieved June 22, 2013.

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"Sapphire Butterfly Brooch". Smithsonian Institution. Archived from the original on January 4, 2013. Retrieved November 13, 2011.

geogallery.si.edu

"Conchita Sapphire Butterfly". Smithsonian Institution. Retrieved April 21, 2012.

sidrichardsonmuseum.org

"Utica (A Quiet Day in Utica) By Charles M. Russell". Sid Richardson Museum. Retrieved November 2, 2011.

thedailybeast.com

Higgs, Levi (12 January 2018). "How Montana Gold Rushers Literally Threw Away a Fortune in Sapphires". The Daily Beast. Retrieved 17 January 2018.

townandcountrymag.com

"The Untold Story Behind Kate Middleton's Engagement Ring". Town & Country. 24 March 2021. Retrieved 16 January 2023.

truewestmagazine.com

Boggs, Johnny D. (September 25, 2009). "Following Charlie Russell's Paintbrush". True West Magazine. Cave Creek, AZ: True West Publishing. Archived from the original on July 8, 2013. Retrieved November 2, 2011.

ubc.ca

circle.ubc.ca

Gauthier, Guylaine (1995). Mineralogy, Geochemistry, and Geochronology of the Yogo Dike Sapphire Deposit, Montana (M.Sc.). University of British Columbia. Retrieved June 4, 2012.

usgs.gov

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"Sapphires". United States Geological Survey. Retrieved October 26, 2011.

pubs.usgs.gov

Clabaugh, Stephen E. (1952). "Corundum Deposits of Montana" (PDF). Geological Survey Bulletin 983. United States Geological Survey. Retrieved April 23, 2012.

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"Corundum". Department of Geological Sciences, University of Texas at Austin. 1998. Retrieved October 28, 2011.

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"Yogo Sapphire Jewelry". Montana Russell Country. Archived from the original on February 5, 2012. Retrieved December 3, 2011.
"Yogo Gulch". Russell Country. 2010. Archived from the original on February 5, 2013. Retrieved February 9, 2012.

web.archive.org

"Yogo Sapphire Jewelry". Montana Russell Country. Archived from the original on February 5, 2012. Retrieved December 3, 2011.
Gibson, Richard I. (Summer 2011). "Yogos: Montana's 'Goldilocks' Gem". Distinctly Montana. Bozeman, MT: Star Ridge Publishing LLC. Archived from the original on March 25, 2013. Retrieved June 22, 2013.
Ward, Jane R.; Attaway, Nancy L. "Roberts Yogo Sapphire Gems". Roberts Yogo Sapphire Mines. Archived from the original on December 2, 2011. Retrieved November 25, 2011.
"Abandoned Mines Historic Context". Montana Department of Environmental Quality. Archived from the original on January 1, 2012. Retrieved November 6, 2011.
Boggs, Johnny D. (September 25, 2009). "Following Charlie Russell's Paintbrush". True West Magazine. Cave Creek, AZ: True West Publishing. Archived from the original on July 8, 2013. Retrieved November 2, 2011.
Moser, Cathy (Spring–Summer 2009). "Yogo City or Bust". Big Sky Journal. Bozeman, MT: Jared Swanson. Archived from the original on April 25, 2012. Retrieved October 24, 2011.
"Great Falls Yogo mine owner killed in mining accident". Great Falls Tribune. March 21, 2012. p. M4. Archived from the original on March 24, 2012. Retrieved March 22, 2012.{{cite news}}: CS1 maint: bot: original URL status unknown (link)(subscription required)
"Sapphire Butterfly Brooch". Smithsonian Institution. Archived from the original on January 4, 2013. Retrieved November 13, 2011.
Crevoshay, Paula (February 2007). "Conchita – Inspiration and Process". Crevoshay. Archived from the original on November 9, 2011. Retrieved November 13, 2011.

yogogems.com

Ward, Jane R.; Attaway, Nancy L. "Roberts Yogo Sapphire Gems". Roberts Yogo Sapphire Mines. Archived from the original on December 2, 2011. Retrieved November 25, 2011.