Makeup Guru

DIATOMACEOUS EARTH/ (dahy-at-uh-mahyt-uhs urth)/n./ 1. A dirtlike substance made from the finely ground fossils of prehistoric algae; n./ 2. Commonly used as a deterrent for household and garden insect pests, it is also a pure, nonabrasive alternative to aluminum-based microdermabrasion treatments, in which mineral-rich particles provide a soft, skin-buffing effect; e.g. “Kick-start your skincare regimen from the ground up, with a diatomaceous-earth face scrub that gently exfoliates dry, dead skin to reveal a more glowing complexion.”

Try it: Philosophy Never Let Them See You Shine Scrub, $20, www.philosophy.com

Ingredients: Earth