Bib Necklace is a type/kind of necklace that covers the decollete similar to a handkerchief necklace. The Bib Necklace curves partly around the neck  and can be symmetrical or asymmetrical. Likewise, a Bib Necklace is described as having several rows of jewels, beads, crystals and other ornaments, sometimes even made from textile flowers and buttons in a cascading design along the Collar bone, hence,  a Bib Necklace is also sometimes referred to as Cascading Necklace. 
 
 A Bib Necklace which is also known  as a Collarette is a short necklace with flowing orn
aments in the front. This style was popularized by Whiting and Davis.