Diamond set yellow gold button stud earrings marked 18ct with one 9ct replacement back. Approx weight 4.32 grams, dia, 6 mm, (hand made by Michael J Chubb Australia), tests as 14ct, marked 18ct with one 9ct replacement back. Approx weight 4.32 grams, dia, 6 mm, (hand made by Michael J Chubb Australia), tests as 14ct