This piece is part of the NESW (North East South West) collection which was inspired by directional themes, vintage compasses, and ancient artifacts. 18K Yellow Gold, .60ct Emerald, .07ct Trillion. This product comes on a charm clasp. Meaning the clasp opens and closes and can be taken off or put on any chain. The chain is 20" and adjustable to 18" & 16". Made and hand-finished in LA, each piece sold helps ocean-related causes.