Made in the USA by Zuni Artist Verona Quam: Blue/Green man-made, syntheticTurquoise Turtle Earrings with Sterling Silver Post BY Zuni Artist Verona Quam: Dazzling Blue/Green synthetic Turquoise Turtle Sterling Silver Post earrings. One or more stones is blue and one or more stone is green. Size from side to side 1/4 inch. From the head to tail is about 1/2 inch. Genuine Dazzling Green Turquoise on each earring. Post / friction backs. Comes with a Certificate of Authenticity