Mineral sunscreens fail on two counts: the cast and the finish. We spent two years grinding non-nano zinc oxide fine enough to disperse invisibly, then suspended it in a squalane and glycerin base tinted with three iron oxides so it reads as skin on a wide range of tones rather than as chalk.
Broad-spectrum SPF 40, tested to ISO 24444 on a panel of 24 volunteers. In a separate 12-week user trial of 88 volunteers, 87% reported they would wear it daily - the only figure that matters in a sunscreen. It sits happily under the pressed powder and does not pill over the hydrating cream.