Vintage Gold, Rhinestone & Pearl Necklace Set

Vintage pearl & rhinestone necklace set. Unsure of material - possibly gold plated since it hasn't tarnished in many years. One tiny ID marking behind earring, appears to be "c" or "o". A couple of stones are slightly darker in shade, unsure if this is intentional/natural or not. Shiny, beautiful, high-quality set, makes a lovely 2for1 gift. Necklace - 43cm at longest setting Earrings - 2cm x 3cm