Vintage early Art Deco 10k white gold filigree diamond En Habillle cameo brooch pin pendant necklace

Vintage early Art Deco 10k white gold filigree diamond En Habillle cameo brooch pin pendant necklace. Gorgeous well detailed filigree mounting with hinged bail on the back so that it can be worn as a brooch or necklace. Measures 1-1/4" x 7/8". Hallmarked "10K" on the fold over safety clasp and also spring ring and jump connector of the 10k white gold 20" long chain. Hand carved genuine shell cameo wearing a rose cut diamond chip necklace "En Habille". Weighs 5.6 grams. In excellent no chips or cracks. All natural cameos when held to strong light will show very fine growth lines to some degree. These are not cracks or damage, they are natural to the shell and unique to each individual piece. In outstanding well babied condition. Circa 1920. This looks like it just walked right off the set of The Great Gatsby, Downton Abbey, or Boardwalk Empire!