Antique Fine Australian Black Opal 18k Gold Ring swiss Note the lovely gold top

Note the lovely gold top bale

"The Glitter & the Gold: Fashioning Americas Jewelry" edited by Ulysses G

and one link before the female clasp end has a full set of English hallmarks

the largest diamond is

Antique Fine Australian Black Opal 18k Gold Ring swiss Note the lovely gold topIt is difficult to believe now, but when opals first entered the marketplace in the late 1800s, many around the world didn't know what to make of these remarkable gemstones. Today, the appreciation for fine opals rests at the polar opposite of those earlier sentiments. Time, knowledge, and familiarity can make all the difference. In this Edwardian ring, an exceedingly fine black Australian opal displays its large patches of color in a splendid array.