| Abstract: | The Thomas Range is world-famous for its production of topaz Al2SiO4(F,OH)2, occurring in lithophysal cavities in rhyolite. Topaz Valley, at the southern end of the range, is perhaps the single most famous locality. While fine-quality, sherry-orange crystals to 5 cm or more in length occur at various localities, pale to medium pink crystals were first reported from the Thomas Range in 1934. The cause of the unusual coloration, unknown for 60 years, is now believed to be substitution of Mn3+ ?? Fe3+ for Al3+. -Authors |
| Genre: | Article |
| ProdID: | 70019614 |
| Citation Author: | Foord, E. E.; Chirnside, W.; Lichte, F. E.; Briggs, P. H. |
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| Citation End Page: | 60 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Mineralogical Record |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Pink topaz from the Thomas Range, Juab County, Utah; 1995; Article; Journal; Mineralogical Record; Foord, E. E.; Chirnside, W.; Lichte, F. E.; Briggs, P. H. |
| Citation Start Page: | 57 |
| Citation Volume: | 26 |
| Citation Year: | 1995 |
| Type: | citation/reference |
| Text: | Pink topaz from the Thomas Range, Juab County, Utah; 1995; Article; Journal; Mineralogical Record; Foord, E. E.; Chirnside, W.; Lichte, F. E.; Briggs, P. H. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1995 00:00 -0600 |
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