Mid 20th Century Diamond Naval Crown Brooch

Brooch in platinum stamped 'PLAT' with no date. There are sponsor/maker mark John Goode & Son. The safety chain on the brooch does test as silver, however it can be removed. There is 39 eight cut diamonds and 7 rose cut diamonds. The eight cut diamonds have an estimated colour H/I, estimated clarity SI1/SI2 and a total estimated carat weight of 0.78ct. One of the eight cut diamonds is chipped. Along side the eight cut diamonds there is 7 rose cut diamonds. The rose cut diamonds have an estimated total carat weight of 0.035ct, estimated colour H/I, estimated clarity SI1/SI2. All the diamonds are in a grain setting. This brooch is pre-owned and is approximately mid 20th century. 

• Platinum 
• Stamped 'PLAT'
• Safety chain test as silver
• Maker/sponsor mark John Goode & Son
• Thirty-nine eight cut diamonds
• Estimated carat weight of one of the eight cut diamonds 0.02ct
• Estimated total carat weight of eight cut diamonds 0.78ct
• One of the eight cut diamonds is chipped
• Seven rose cut diamonds 
• Estimated carat weight of one of the seven rose cut diamonds 0.005ct
• Estimated total carat weight of the seven rose cut diamonds 0.035ct
• Estimated diamond colour of both cuts H/I
• Estimated diamond clarity of both cuts SI1/SI2
• Grain setting
• Pre-owned 
• Mid 20th Century
• Weight 5.8g
• Length of one of the eight cut diamonds 0.185cm
• Width of one of the eight cut diamonds 0.185cm
• Depth of one of the eight cut diamonds 0.1cm
• Length of one of the rose cut diamonds 0.12cm
• Width of one of the rose cut diamonds 0.12cm
• Depth of one of the rose cut diamonds 0.06cm
• Length 2.9cm
• Width 1.67cm