Superb Art Deco 18k Platinum Set Diamonds & Huge Gem Citrine Brooch. The Citrine is a deep orange, beautifully cut stone measuring approx. 30 carats. There are 24 diamonds. They are high quality Platinum set I color VS 2 clarity. Total diamond weight 1 carat. This is a gorgeous and unique brooch, could easily be converted to a pendant or if you have a good jeweler he could make you a beautiful ring from this brooch.