microperthite

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A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

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New York NY/ USA- November 23, 2018 Hordes of shoppers throng the Macy's Herald Square flagship store in New York looking for bargains on the day after Thanksgiving, Black Friday.

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Thanksgiving Celebration Traditional Dinner Setting Food Concept

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Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

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microperthite

mineral

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alkali feldspar

In orthoclase
Because the intermediate members, called orthoclase–microperthites, cannot blend homogeneously, they take the form of intergrowths of microscopic but distinct crystals of the sodium and potassium end-members.
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