This is Momi, Kahelelani & Tahitian pearls necklace. This necklace made of white Momi, green, black, red burgundy, pink and dark burgundy Kahelelani shells.
Origin of shells: Niihau
Shells + pearls section measures: 7 inches (measures from jump ring to jump ring)
Over all necklace measures: 17 1/2 inches measures from end to end
Findings: 14K gold filled
Pearl size: 8-9 mm