Not actually a 70s mood ring, but I can understand why  Bluboho feels it has that feel. They explain, “Choose your mood, create your vibe. these rings are designed as a reminder that you are the maker of your mood – embrace the grounded, confident and in-tune you with labradorite. Handcrafted with precision from an original wax carving and adorned with sparkling diamonds, this extraordinary piece showcases an enigmatic labradorite gemstone ensconced in 14K recycled yellow gold. Featuring a one-of-a-kind, hand-cut, free-form gemstone, our labradorite diamond mood ring grants you the ability to sculpt and mold your emotional journey, granting you mastery over your inner world.”

This version sells for CAD$798 and the design is available with other stones; prices vary.