Vintage 10k gold rainbow gemstone channel set band

Vintage 10k solid gold band ring with channel set natural princess cut gemstones. Size 7. Stamped 10k and R Klein. Slight flaw on the underside of the band. It is difficult capture in photos and is not visible when worn. Originally purchased from the Dandy Stone for $300+. Tags: 10kt, 10ct, 10 karat, 14k, 14kt, sapphire, peridot, topaz, amethyst