This is a vermeil rectangle ammolite pendant. It is sterling silver with a thick gold plating. It measures 11mm wide and 31mm tall, including the bail. Each pendant is handmade, and none are exactly alike. This piece comes with a 18in display chain. Ammolite is a rare, iridescent organic gemstone formed from the 70-million-year-old fossilized shells of ammonites. This gemstone is known for its vibrant, opal-like color flashes and for its uniqueness. The rare fossilized shells can be found in Alaska.