c1780 18K Monogrammed Bullseye Agate Ring

An unusual antique heraldic signet ring in an unusual shield shape and set with a layered 2 color carnelian agate. The shoulders are ornamented with a raised repousse pattern, fittin...

This wonderful lava ring was sold in Naples to travelers on the Grand Tour as souvenir jewelry in the 1820’s to 40's after the discovery of the ruins ...

We love this bloodstone Chalcedony signet ring for its unusual decorative shield shape, a copy of a decorative shield that was popular in the 19th century. The shape of this escutche...

Substantial and large, stamped 14 karat oval signet ring of bloodstone, nearly .75 inches high, with various maker's marks stamped on the inside of the polished gold band. A substant...

A lovely Ancient Roman gem. The orange and white banded agate intaglio is over 2000 years old. In tondo (carved on the horizontal), we find a peacock between two cornucopias and abov...

Set in 14k gold, the banded agate intaglio ring is hand-carved with a unique image: a shield topped by a knight’s helmet and a plume of feathers. T...

Castellani® has selected this Ancient Roman Agate Intaglio for the "Cleopatra" Ring Setting. The intaglio dates to the 3rd to 7th Century. The intaglio is both black and white agate, which is a hard stone and very good for carving. The agate has two layers of color, black on the top and white at the bottom. The agate intaglio is solid and is one piece. The carver was able to use these two color layers to give dimension and detail. The Column and Angel on the left wings are white and the balance is all black. The Carver knew the material he/she was carving and used this to create this very unique scene. The intaglio shows two angels standing on either side of a column/pillar looking at the bust of a man on top of the pillar. The angels are female and male. The bust on the pedestal is of a male. The intaglio is set below the frame. The frame flairs out to a subtle point on the sides and has a flat surface. The "Cleopatra" ring design was a style that Castellani created in the 1860's and was inspired by Ancient Roman rings...

An exceptional, impressive antique banded agate and 14 karat yellow gold intaglio signet ring; part of our diverse antique jewelry and estate jewelry collections. This exceptional, fine and impressive signet ring has been crafted in 14k yellow gold. The substantial antique ring setting (circa 1880) displays an oval carved banded agate panel (circa 1820), ornamented with a carved intaglio. The intaglio bears a male profile, featuring a beard and tied headband. The surrounding setting is plain and unembellished, melding with the incurved shaped ring shoulders and blending seamlessly with the plain ring shank. This antique intaglio ring...