Emerald lab-created & diamond size 7 ring fine yellow gold layer over 925 silver

Pretty dainty stackable band ring size 7 with four light green opaque emeralds and three clear diamonds = all prong set, cut round, and in sizes unknown to Seller but not at all large, especially the diamonds are small. Seller Presidium-tested the stones and they are indeed emeralds (assumed lab-created) and diamonds. Metal is sterling silver with a thin fine layer of yellow gold over the top. Incised inside = China + 7 + 925 + what looks like "R". About 1/8" wide in front. Total weight = 2.2 grams. Very good condition = all stones accounted for and secure in setting, some minor nicks and scratches on the band but no wearing away as yet of the yellow gold layer. Super comfortable on the finger. Notes: Seller is listing two similar rings that stack with this one - together, the three rings - sapphire, emerald, and ruby make a remarkable presentation. Seller bought these rings new from a department store a long time ago.