Black Opal Mineral Powder Foundation #1441. Black Opal mineral powders are the first with buildable coverage, especially beneficial for women of color. Other products are not formulated for the needs of women of color. Other products are designed to give sheer, see through coverage. But, on dark skin tones they appear uneven and gray and ashy. Black Opal mineral powders are talc free so they never look ashy. And, no matter a woman's skin tone, she can build the coverage she needs.