Antique 24 ct Black Opal Brooch Surrounded by Diamonds Set In 18ct Gold

This antique (circa 1920) 24 carat Black Opal brooch with vibrant flashes of green and blue is surrounded by 68 diamonds and set in 18 carat yellow gold and platinum. An Opal of this size is an exceptionally rare find in vintage jewellery, making it a collector's gem.

• Black Opal: 24 carats, 2,72 cm x 1,87 cm x 0,73 cm
• Diamonds: 4 old mine brilliant cut diamonds 0.24ct colour and clarity H/J, si/i
• Diamonds: 4 brilliant cut diamonds 0.10ct colour and clarity H/J, si/i
• Diamonds: 60 rose cut diamonds and senailles. 0.10ct
• Metal: 18 carat yellow gold and platinum (touchstone tested)
• Hallmarks: Dutch hallmark 14ct from 1953 on pin, Dutch hallmark on edge for 18ct gold used between 1906 and 1953.
• Dimensions: 3,55 cm x 2,76 cm
• Gross Weight: 10,30 gram
• Condition: very good
• Country of Origin: Netherlands
• Period: circa 1920