Is it true that mineral makeup contains a natural sunblock?

Mineral makeup provides natural, broad-spectrum UV protection from nature's elements without skin irritation. In a world that's turning to a "green" and a more natural way of living, artificial chemicals and preservatives are being left behind. Earth-based minerals are a wonderful alternative to chemical-laden cosmetics. Mineral Fusion makeup contains Zinc Oxide and Titanium Dioxide that will provide UVA and UVB protection.