Art Deco demantoid garnet and diamond cluster ring. Centrally set with an octagonal emerald-cut demantoid garnet in an open back claw setting with an approximate weight of 1.30 carats, flanked by four rectangular baguette cut diamonds in open back rubover settings with a combined aproximate weight of 0.44 carats, further set with eight single cut diamonds in open back grain and rubover settings with a combined weight of 0.16 carats. The total approximate diamond weight is 0.60 carats, to an elegant cluster design featuring polished edges, an intricately pierced gallery and open backholing, the slightly raised shoulders flowing to a solid D-shape shank. Tested platinum, circa 1925, accompanied by Gemmological Certification Services report #81304-37.

Demantoid garnets derive their name from the Flemish word ‘demant’ meaning diamond, due to their diamond-like lustre and dispersion. Gem quality demantoid garnets are often small is size but feature a distinct and vivid green colour. First discovered in Russia’s Ural mountains in the mid-19th century, Russia and was the only source until the discovery of the Namibian deposits in the 1990s. The Russian mines are long since depleted and to this day, the finest examples of this gem are found in antique pieces.

One of the unique features of demantoid garnets is the presence of characteristic needle-like inclusions known as "horsetails”. A well-defined horsetail inclusion within a stone is highly-prized.

Demantoids became a signature gem of the house of Fabergé, and was a favourite gemstone for the decorative designs of the Edwardian and Art Deco eras.

This ring is in good condition.