This ring, dating from the 1970's, is marked 10k and bears the hallmark of the House of Kraus. This small family firm used some older cameos they had acquired, and produced these pieces in the 1960's and 1970's. The hardstone striped agate cameo has nice detail. The stone measures about 10mm x 14mm.
Kraus made very traditional style mountings. This particular mounting and stone complement each other quite nicely. Excellent condition, with virtually no signs of wear. The ring is a size 6.