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Amy Y. Conry Davis is a writer who specializes in green living, sustainability, and travel. She holds a B.A. in English from the University of San Diego. Colloidal oatmeal is ordinary household ...

Occasionally referred to as ‘colloidal gold,’ gold colloid is a suspension comprising sub-micron gold nanoparticles suspended in a solvent - most commonly water. Gold nanoparticles' distinct ...