Yellow metal signet ring with intaglio carved stone

This piece appears to be a men’s signet-style ring constructed from a yellow-toned metal. Inside the band, a stamp is visible that reads "10K", which is consistent with 10-karat gold purity, though this remains unverified without professional testing. The ring features a prominent, rectangular dark stone—possibly onyx or sardonyx—with an intaglio carving depicting what appears to be a Roman soldier or centurion in a chariot. This motif is stylistically consistent with mid-20th-century cameo and intaglio jewelry. The metal surfaces show signs of moderate wear, including fine surface scratches and minor scuffing, particularly on the shank and shoulders. The stone is held in a bezel setting and appears slightly raised from the frame. The overall craftsmanship is consistent with commercial jewelry production from the mid-to-late 20th century. The identification of materials and age is a hypothesis based on visual markers; physical inspection is required for a definitive determination of metal content and stone type.

I have examined the image provided of the yellow metal signet ring featuring an intaglio stone. Based on what I can see, the ring bears a '10K' mark consistent with 10-karat gold, and the motif of a centurion in a chariot is consistent with mid-20th-century commercial intaglio jewelry. However, I cannot verify the metal purity or the stone's composition from a photo alone; physical inspection, such as an acid or XRF test for gold and a refractive index test for the stone, would be required. The value estimate is based on the hypothesis that the piece is 10-karat gold with a genuine carved stone, such as onyx or sardonyx. This estimate reflects the current market demand for vintage fraternal or 'heritage-style' men's jewelry, where condition and metal weight are primary drivers. The present wear, including surface scuffs on the shank, suggests a life of regular use, which is typical for this category. If the metal were to be identified as a base metal or gold plating rather than solid 10K gold, the value would likely decrease to the $20 - $50 range as a decorative costume piece. Conversely, if the intaglio were a rare antiquity rather than a mid-century reproduction, the value could increase significantly. To reach a more stable valuation, an in-person examination by a certified gemologist is recommended to rule out synthetic materials or lower-grade alloys.