Bands in this "crossover" style were introduced near the start of the Edwardian era, but the graceful form stayed in favor for decades, so they're often difficult to date; however, the use of 10k gold here makes 1930s origin most likely for this ultra-feminine beauty from a New York estate. That the tourmaline and diamonds are laboratory versions actually points less to the Depression years, since good synthetics were widely used even in very expensive jewelry during the Art Deco boom years. Synthetics aren't "fakes" like glass; they're engineered to duplicate the chemical properties of natural stones so faithfully that even expert jewelers must perform sophisticated tests to identify them.
Although already antique by American 75-year standards and close to the European century mark, this lovely ring can't have been worn much. The stones are pristine; I can't find a scuff on them, and high magnification is required to notice even slight surface wear to the gold. It really couldn't be more giftable.
Current size is US 6.25 - 6.75, easily altered to your needs, since the back of the shank is unadorned. We state sizes as a range, because different types of measuring equipment vary up to half a size, as do our fingers with temperature and time of day.
There's no charge for insured U.S. shipping, with an equivalent discount on international delivery, and gift-wrap is always free when desired. Please e-mail to confirm availability, order or request more photos. Thanks for looking!