plagioclase

• EU > United Kingdom > Highland > Rhum
• NA > United States > Colorado > Fenders-Magnotte Peg
• NA > United States > Colorado > Hiwan Ranch
• NA > United States > Colorado > Iowa Gulch
• NA > United States > Colorado > Rowe'S South
• NA > United States > Connecticut > Mt. Tom Beryl Prospect
• NA > United States > Connecticut > Southford Quartz Pegmatite Quarry
• NA > United States > Idaho > Mica Dome Prospect
• NA > United States > Idaho > Panther Prospect
• NA > United States > Virginia > Crews Prospect
• SA > Argentina > Neuquen > Maria Rosa, San Ramon, Amarga

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Source: United States Geological Survey Mineral Resources Program

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