Unusual Prehnite & White Topaz 9K Gold Ring Size N 1/2. It has a beautiful gold setting, the Australian Prehnite is just a wonderful colour and the shoulders are set with beautiful white topaz. It contains 4.32 grams of 9ct yellow gold. Size N 1/2. It is fully hallmarked the makers mark "DK", the anchor for Birmingham, 375 and the date letter "h". Excellent new condition condition. Comes with the certificate of authenticity.