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

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