Pair of 18kt yellow gold 3mm green enamel Vintage stacking bands by Hidalgo, size 8 (no sizing). Hidalgo Corp. was founded in 1983 in New York City by Silvio Hidalgo. The company specialized in beautiful 18k gold enamel rings, many of them stackable, set with diamonds and gemstones. The stacking rings allowed wearers to mix, match, and build their own stories. These can be paired with a diamond band or plain gold for different looks.