PSCO Opal Jewelry saving Set

Product Name: PSCO Opal Jewelry saving Set
This is a beautiful antique jewelry set by the PSCO jewelry company. It comes with an opal ring with red stones, either ruby or garnet, 2 opal and diamond (I think) earrings, and a square opal necklace with diamonds (I think). There is a 924 P☆M stamp on the necklace pendant and earrings, meaning the material is white gold. The pendant says 10K PSCO, meaning it is 10k gold alloy. The necklace chain was unfortunately lost. I have not worn these much and they have been cleaned since then. I do not know if the clear stones are diamond or not, but they still look nice. Includes: Two saving earrings, pendant, ring, no chain.