An unusual opal and diamond octopus brooch - i think the use of "unusual" is overkind
Australian Opal Diamond Brooch ,This exquisite flower brooch design features seven australian opals weighing 19.78 cts. total. The stem and leaves are encrusted with pave diamonds. In the center of the flower are three oval and two round brilliant diamonds. Handmade 18k white gold setting.
A Victorian opal and diamond butterfly brooch with carved opal wings on a pierced and engraved gold back with old brilliant-cut diamond-set body and ruby head, the diamonds weighing approximately 0.80 carats, circa 1880,
14k Yellow Gold Huge 38 Carat Carved Natural Opal Cameo Pendant ...Sold for $2650
Art Nouveau brooch-pendant. Set in yellow gold with plique-à-jour, opal, diamond and pearl. This brooch is not clearly marked, but there are brooches in this same style from the American firm Krementz & Company.