Thanks for reaching out. So glad you found us Terri.
The C.L&S is the maker’s mark. In British hallmarking, this specific stamp is most commonly associated with Charles Lyster & Son, a well-known British Jewelry manufacturer and silversmith located in Birmingham.
The C/Z refers to Cubic Zirconia, which means the centre stone of the ring is a lab-created diamond simulate rather than a natural diamond.
The 375 hallmark indicates that your ring is made of 9-karat gold, meaning it is 37.5% pure gold. The remaining 62.5% is comprised of strengthening alloys, such as copper, silver, or zinc, which make the jewelry more durable for everyday wear.
