Vintage Spinel Ring Product Details Product Code JRSp70145 Share Add to Wishlist Ask About $3,000.00 Add to basket Tax Included Description One antique, 18 karat yellow gold spinel and diamond ring. One spinel (0.75 carats: Deep intense red with orange hue). Two old European cut diamonds (0.29 carats: VS clarity: H-I colour. Glasgow, circa 1904-1905. Trademark “JB & S.