Orthoclase: Mineral information, data and localities.

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Mineral - Wikipedia

Potassium Alum - National Gem Lab, Alum

Orthoclase Mineral Physical-Optical Properties, Uses, Occurrence

Orthoclase Mineralogy4Kids

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Mineral Specimen Cleaning and Preparation - NO SALES! No Lapidary!

Southeastern Rondônia - DOBES, rondonia

Dr. Luis A. Gonzalez, MD, San Benito, TX

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