This is Kahelelani poepoe style shell necklace/pendant. This pendant made of green red ‘ākala wai pāpipi, ‘ākala ‘āhiehie, ke‘oke‘o and kāmoa ke‘oke‘o Kahelelani shells.
Origin of shells: Niihau
Shells measures: 3/4 inch (measures from jump ring to jump ring)
Necklace measures : 17 inches (measures from end to end)
Findings: 14K gold filled
Chain style: Fancy Italian