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Showing results for tags 'petrography'.
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Talks about origin and mineralogy of gem-bearing pegmatites
Oxytropidoceras posted a topic in Rocks & Minerals
Below are some talks on gem-bearing pegmatites Spectacular Gem Crystals: Pegmatite Pocket Formation and Survival Tom Campbell, Staff Mineralogist, The Arkenstone, Oct. 4, 2019 https://www.youtube.com/watch?v=SS50-WzOjvg https://www.youtube.com/channel/UCIqF4IlVr75GZMROmG3myEA Granitic pegmatites Formation and mining by Mark Jacobson, Retired Chevron Corporation, June 6, 2016 https://www.youtube.com/watch?v=1hDp9Bizq78 https://www.youtube.com/channel/UCIqF4IlVr75GZMROmG3myEA Pegmatites: An Update on Recent Production Peter Lyckberg, 2018 GIA International Gemological Symposium https://www.youtube.com/watch?v=jDpIKxWoq2M Yours, Paul H.