18k solid Yellow Gold & Platinum 1 Carat total weight natural Diamond Thistle Brooch weighing 18.7grams. This brooch measures roughly 3 inches long and is set with approximately 1 carat of diamonds. It is signed by the designer with a maker’s mark that appears to me to be CJ? It is signed both on the gold and the platinum settings. I have had this piece professionally appraised by a gemologist who verified the metal and gemstones however I do not have the paperwork anymore. Through my research I did see that Cartier jewelry produced several brooches that are very similar to this one however I cannot confirm the maker of this piece. It is a very high quality piece of jewelry and is worth much more than my asking price. If you have any other questions or would like any other additional information please let me know and I will be happy to help. Thanks