We're all thinking harder and longer these days about how to protect our planet and where to shop—and buying pieces that have longevity, like jewelry, is a great place to start if you want to feel good about an upcoming gift or a treat-yourself purchase. Crucial for that feel-good factor: shopping from brands that not only advertise ethical values but actually build their businesses around them.

There are certain pieces in every woman’s jewelry collection that she considers eternal classics—her first pair of pavé huggies, the 14-karat gold chain necklace she can wear with anything, or a personalized signet ring. These are the ones she’ll always save in a fire and wear again and again no matter the season.