I am not a gemologist, but these appear to be Green Aventurine.
Green Aventurine is said to benefit one in all areas of creativity, and imagination, as well as intellect and mental clarity. It is thought to be a gentle stone that gives a sense of calm and balance and enhances happiness. It also helps one to see alternatives and potentials in all situations, giving a positive outlook, courage and inner strength. It is also said to bring luck, especially in games of chance.

Necklace is approximately 16 inches and closes with silver-tone barrel clasp.
Pendant size is 1" long by .75" wide and is held by silver-tone gallery at the top. It is a darker green and could be a different stone than the necklace itself.
Bracelet is approx. 9" long and closes with silver-tone barrel clasp. 
Earrings approx. 2.25" long and are on a silver-tone French hook.
Natural stones have different colors and sizes 
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