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There's no denying that fashion is cyclical. The 80s is a prime example as most people agree it was just the 40s with exaggerated shoulder pads. Y2K style, which was mocked at one point, is now being redeemed with countless designers designing pieces that nod to the era. Jewelry is certainly not immune to the phenomenon. First traced back to prehistoric times, cabochon rings are the latest old-school obsession.