This original antique piece features a 5.8mm cabouchon onyx diagonally set from a fine quality old cut diamond weighing approximately 0.40ct both rubover set onto a Deco design bar brooch. The bar is beautifully inlaid with 9 old cut diamonds set in a typical Art Deco style mill-grained mount with a total approximate diamond weight of 1.00ct. The brooch is perfectly fitted with a secure pin closure. Measuring 6.3cm in length and weighs a total of 9.11 grams. Tested Platinum. England, circa 1920's.