Two Vintage Cloisonne Tea Cups

Set of two old cloisonne tea cups. one is accented in green and one accented in dark blue. Inside is a pretty dark turquoise blue . Rimmed in copper - brass color, top and bottom. The cloisonne has dots like air bubbles on both sides and bottom but not inside. I’m not sure how cloisonne is made I assume it is a manufacture thing. Approx. 2 3/4” Parents had them marked $35.00 each but discounting because of it. Sold as a pair as is. (12-15-23-E)