Gem Crystal Pegmatite Pocket Formation and Survival
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Pegmatites of Western Australia
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The World of Thumbnail Minerals
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Mineralogy & Mining of Oregon Sunstones
58:44
The Mineral-Security Nexus (Critical Minerals, Rare Earth Elements, Conflict Minerals)
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Collecting Minerals in Morocco
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Mexican Silica by Peter Megaw
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Illinois Fluorite: The Illinois-Kentucky Fluorspar District (IKFD)
59:55