This necklace and earring set is made of 18kt gold over sterling silver with 13 oval cut garnets and 10 single cut genuine diamonds. The chain comes with an attached 1-7/8" extender so you can wear the necklace at the full 19-3/4" length or shorten it to 17-7/8". The total gem weight is approximately 10 carats. The matching earrings have basket style mounting with 14kt gold posts.