thanks for writing in. As these pearls are in the original box with the certificate authenticating Majorica they will be worth more. The length and size of the pearls will also be a factor in the price.
The numbers that you see could be the quality control numbers. The "diamonds chips" on the clasp are most likely cubic zirconia.
The synthesized material is hard, optically flawless and usually colorless, but may be made in a variety of different colors.Because of its low cost, durability, and close visual likeness to diamond, synthetic cubic zirconia has remained the most gemologically and economically important competitor for diamonds since 1976.
