Georgian Era Natural Spinel RingGeorgian Era natural red spinel in a simple 18k gold setting. England. Circa 1790. This remarkable ring centers on a richly hued red spinel, a gemstone of exceptional rarity and distinction in the 18th century. Likely sourced from the famed mines of Badakhshan in present day Afghanistan, the spinel displays a vivid red tone once indistinguishable from ruby a confusion that persisted until gemological science advanced in the 19th century. In the 1790s,