Very unusual signet ring, created in Paris France around the 1880 during the Victorian Era. Crafted with very strong geometric patterns in solid yellow gold of 18 karats with high polish finish. Gemstones: Mount on top with 1 flat cabochon cut carved from Sardonyx agate of about 13.5 carats. Birthstone: For the month of August. Weight: 6,45 Grams, (4.14 Dwt). Size: 10 and may be easily sized on request. Measurements: From the top view is 22 mm by 22 mm (0.87 x 0.87 Inches). Hallmarks: Stamped with French marks, the head of the eagle for the assay and warranty of the gold and the maker's maitre mark inside a lozange cartouche. The overall condition of this ring is excellent. Beside the little normal wear, there is no damage to the gold. The lapis is secured in the settings.