The listing, 14k gold stud flag butterfly chevron earrings has ended.
The U.S.A flag earrings have hallmark of 14K on stems and the backings marked 14K JEWELMONT. I think it's interesting that the gold American flag has the color enamel of red white and blue. This my first time coming across color decoration on gold.
Haven't found the hallmark on the butterfly with opal stone earrings and the chevron logo/badge earrings but tested with 14K gold acid and show positive.
The backings of the butterfly earrings has one marked 14K with triangle and lines intersecting it and the other marked 750 (for 18K gold).
One backing on the Chevron logos is marked 14K and the other backing is marked 14K G.F.
Adding another interesting earrings. The post signed 14K and tested 14K but the rest is not gold. Probably just gold filled.
Let me know if you have any questions.