Bidspirit auction | Ammonite Fossil Silver Necklace and

Ammonite Fossil Silver Necklace and Ring - Madagascar - Ammonite Fossil Silver Necklace and Ring - Madagascar. Sterling silver ammonite fossil jewelry from Madagascar. Ring, size 10.5, set with an ammonite fossil, marked 925, with a nice patina; 9.83 g. Matching bib necklace set with three ammonite fossils, black onyx (or similar dark stones), and faceted amber-tone gemstones in sterling silver; approximately 93 g. Original tag included.