All of our jewelry is guaranteed authentic by our Graduate Gemologist of the Gemological Institute of America (GIA). Antique 10k Yellow Gold Banded Genuine Natural Agate Ring Size 5 (#J7271) 10k yellow gold ring featuring an oval cabochon cut banded agate. The agate measures about 18mm x 12mm. It is colorless translucent with brown bands. The stone is set onto the gold backing so the metal shines through the agate, and makes it looks a little like moonstone. The ring fits a size 5 finger and weighs 2.36 dwt. It dates from about 1900. Fantastic! Please note: This item may be slightly under the karat stamp due to year of production or composition variances - such as sizing or modifications - as they may affect metal purity. Vintage pieces generally have a slightly lower karat percentage than the stamp. SKU#J7271. 100% Satisfaction Guaranteed!