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P. E. Champness, K. A. Rodgers (October 2000). "The origin of iridescence in anthophyllite-gedrite from Simiuttat, Nuuk district, southern West Greenland.". Mineralogical Magazine. 64 (5.1): 885–889. Bibcode:2000MinM...64..885C. doi:10.1180/002646100549715. S2CID140574142.
semanticscholar.org
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P. E. Champness, K. A. Rodgers (October 2000). "The origin of iridescence in anthophyllite-gedrite from Simiuttat, Nuuk district, southern West Greenland.". Mineralogical Magazine. 64 (5.1): 885–889. Bibcode:2000MinM...64..885C. doi:10.1180/002646100549715. S2CID140574142.
web.archive.org
Geological Survey of Denmark and Greenland (GEUS), ed. (2008), "Minerals in Greenland"(PDF), Geology and Ore (in German), no. 12, p. 12, archived from the original(PDF) on 2011-12-21, retrieved 2012-11-08
"Gemstones of Greenland"(PDF). Geology and Ore. Geological Survey of Denmark and Greenland (GEUS). January 2007. Archived from the original(PDF) on 24 February 2013. Retrieved 4 December 2012.