Professionals and non-pros alike are well-served at Diamond Bar Beauty Supply. It's a sizable place that is clean and bright inside. The aisles and rows hold countless beauty options and supplies—from hair and nail goods to makeup and skin needs. Whether looking for a hot pink hair color or a deep-purple nail polish, chances are that Diamond Bar Beauty Supply has it on-hand. A wide array of appliances and equipment can also be found here—including clippers, blow dryers and curling irons.