I have listed them as vintage though they may be over 100 years old it could be that they are between 80 and 100 years old. On the back of the clasp you will see the 935 stamp, which is above the standard for sterling silver. Britain was the destination of a lot of natural pearls "caught" in the saltwater areas of the world that people have been diving and finding these unique treasures for thousands of years. In Canada we don't have the ability to X-ray pearls.
Natural pearls have evidence in them that experience grants the ability to identify. The off round shape of the pearls without being baroque, the lustre and looking in the holes you can see that there is no shell center that are used to cultivate cultured pearls. The size of the pearls graduation is from 3mm to 8mm in the middle. The body color is silver cream with slight Rose/Green/Aubergine overtones. The overall quality is A+ which is amazing for natural pearls.The round to off round shape shape is typical of natural pearls. There are 166 pearls in all and they are mostly the smaller size, which is another natural pearl necklace identifier. The rondelle spacer beads are natural blue sapphires and the marquis set in the sterling clasp is a synthetic blue sapphire. The white stones are paste in the clasp. It has been restrung and I could see that they are natural saltwater pearls with a few replacement cultured ones, when this was done. (Restringing reveals the holes and you can see inside to see if a pearl is natural or cultured). This is an incredibly rare natural pearl and blue sapphire double strand don't miss this one of kind vintage piece. PLEASE LOOK AT THE APPRAISAL.
The item "Antique Silver Sapphire Natural Pearl Graduated Double Strand Necklace Appraisal" is in sale since Monday, January 28, 2019. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Costume\Art Nouveau/Art Deco 1895-1935\Necklaces & Pendants". The seller is "colleyo" and is located in Toronto, Ontario. This item can be shipped to United States, Canada, United Kingdom, Germany, Australia.