MiaDonna

MiaDonna works only with lab-grown diamonds and lab-created gemstones, set in recycled precious metals, and it is a certified B Corp. It explains that a lab-grown diamond is pure carbon with the same optical, physical and chemical properties as a mined one, and it positions the stones as an ethical alternative. The company plants a tree with every order and runs custom design services alongside its ready-made pieces.

The flagship boutique is in Portland, Oregon, with virtual appointments and live chat for buyers who can’t visit. Orders carry a lifetime guarantee, financing can be spread over up to 36 monthly payments, and the site lists free returns within 60 days. Its default shipping is US-focused, so check the country options at checkout before ordering to Switzerland.