Amethyst Earrings 14kt Yellow Gold. For sale is a pair of 14kt yellow gold earrings set with amethysts. Each post stud has a gold-rope trimmed bezel containing one modified oval cut amethyst. The amethysts weigh 6.50cttw and are medium, slightly grayish to very slightly bluish-purple in color. They are in very good condition and come with an insurance appraisal of $839.00.