I'm looking for a good, clean mineral sunscreen that has at least spf 45, which I know is kind of hard to achieve with just mineral, but I prefer physical suncreen to chemical. Anyone have recommendations? I have very sensitive acne-prone skin as well.

Have you ever tried Rodan+Fields' Soothe Mineral Sunscreen? It's only SPF 30, but it's a part of their line built for Sensitive Skin. The line is called Soothe.

Sunplay Skin Aqua UV Watery Gel SPF 50+ PA++++