Such a cool antique find! The light milky purple stone in the center of the ring is a Sardonyx which is a type of Chalcedony. Chalcedony is a mineral composed of microcrystalline quartz, while sardonyx is a variety of chalcedony that is banded with layers of sard, a reddish-brown mineral, and white chalcedony. This mixture of banding is what gives the stone a unique color. It is carved in a shield signet design with beautifully carved shoulders in 15 karat gold. 

• 15 karat yellow gold Sardonyx Chalcedony
• 12mm width at top, 2mm width at bottom
• 4.75 grams
• Ring size 5.5.  complimentary ring resize available upon request. Please note rings that have been resized are not eligible for return or exchange as we believe in preserving each piece's integrity. You may send a ring back to us for resizing at a later date if you would like to keep the option of making a return available to you. Please see our FAQs section for more information.
• Circa 1900. No hallmarks.