Russian Glacier Topaz 9k Yellow Gold Ring Size M. The oval cut Glacier Topaz is just gorgeous and was mined in Russia. The setting is really stunning and is wonderfully designed, the quality is excellent. It is fully hallmarked for 9ct gold with "375", anchor for Birmingham and makers mark "DK" plus date letter "f". It contains 2.50 grams of 9ct yellow gold. Size M. Excellent condition. Comes with it's certificate of authenticity.