An early 20th century opal and diamond brooch, the large oval opal mounted within diamond set shaped rectangular border, opal measures approx 30mm x 24mm, all set in white metal with attached safety chain, total weight approx 11.7g Condition report: Opal with prominent red and orange play of colour, together with purple/blue and green, some broad crazing to the surface, opal measures approx 6mm deep, largest diamond weighs approx 0.10cts, colour of diamonds approx G/H/I, clarity range SI1-I1, general wear, refer to images