Do you use any nano or micronized particles? May 09, 2018 12:42 Updated None of the particles are small enough to be classed as micronized or nano-particles. Related articles What is the exact size of the Titanium Dioxide particles in the powder foundation? Are both grades anatas and rutil structures of Titanium Dioxide safe for use in cosmetics? Are your products made from all natural ingredients? What testing do your ingredients go through (specifically titanium dioxide, iron oxides, zinc oxides, and mica)? Where is your Mica sourced