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- Beauty of the Mineral World. University of Chicago Press. p. 83. ISBN 9780226305110. Retrieved 18 January 2018. "The Samarian Spinel". famousdiamonds.tripod...2 KB (174 words) - 19:36, 23 May 2024
Beauty of the Mineral World. University of Chicago Press. p. 152. ISBN 978-0226305110. Archived from the original on 2018-04-29 – via Google Books. "Tourmaline:...40 KB (3,205 words) - 19:51, 17 October 2024
Natural Beauty of the Mineral World. University of Chicago Press. ISBN 9780226305110. "Archaeologists have discovered the oldest treasure in the world -...14 KB (1,361 words) - 10:58, 29 August 2024
