The "Ocean Emerald" set must be a souvenir of a 1970's or 1980's cruise, as the little green box still has the price tag from Shell Seekers of St. Thomas, $12.99.
Inside is a heart shaped necklace with an 18" gold-tone chain, and triangular post earrings. The heart is just 1/2" across and the earrings are about 3/4" across.
The box states "The look of emerald". The pieces are iridescent shell, dyed a bright green. The set is dainty enough for a young lady and green enough for St. Patrick's day.