Red Spinel and Diamonds Ring, 18k White Gold Red Spinel and Diamonds Burmese Red Spinel and Diamond Dress Ring, circa 1970 For Sale at 1stDibs Burmese Red Spinel and Diamond Dress Ring, circa 1970 For Sale at 1stDibs Oval Red Spinel Ring, 3.76 Carat at 1stDibs red spinel rings for sale. An impressive solitaire ring set with a rectangular cut red spinel stone. Measures 8x6mm. Head measures 8x6mm, depth 7. 5mm. Weight 5. 3grams. A very good heavy weight band and setting. Stamped 585, tests as 14 carat gold, overseas manufacture so no hallmarks. Size P, we can resize free of charge.