Mid Century GIA 3.25 carat Colombian emerald diamond 18k yellow gold ring

This mid-century 18k yellow gold ring features a GIA-certified 3.25-carat emerald cut Colombian emerald, F2 treatment, flanked by two old European cut diamonds totaling approximately 1.20 carats, G color, SI clarity. A striking and elegant vintage design. Hallmarked with a purity mark. Circa 1960s. Certificate: GIA  #1232504405 Center stone: Emerald cut emeraldWeight: Approximately 3.25 caratsOrigin: ColombiaTreatment(s): F2Accent stone: Two old European cut diamondsWeight: Approximately 1.20 caratsColor: GClarity: SIMetal: 18k yellow goldEra: Mid CenturyCirca: 1960'sHallmarks: Purity markSize: 7 1/4 and can be resizedGram weight: 4.53