18K Gold Filled Paperclip Chain Lobster clasp Thickness: 3 mmWhat is gold-filled? A layer of gold is permanently bonded onto base metal with heat and pressure that contains 100+ times more gold...

18K Gold Filled Herringbone Chain Lobster clasp Thickness: 4mmWhat is gold-filled? A layer of gold is permanently bonded onto base metal with heat and pressure that contains 100+ times more gold than...

18K Gold Filled Cuban Curb Chain Lobster clasp Thickness: 4.5 mmWhat is gold-filled? A layer of gold is permanently bonded onto base metal with heat and pressure that contains 100+ times more gold...

18K Gold Filled Box Chain Lobster clasp Thickness: 2 mmWhat is gold-filled? A layer of gold is permanently bonded onto base metal with heat and pressure that contains 100+ times more gold...