Beautiful Majorica pearl necklace

Absolutely beautiful Majorica round pearl necklace in fancy tahitian light and dark greys, white and golden. Has a lovely pave twist closure ball clasp that can be worn in front to one side or in back. These are approx 18" in length and at least 10mm but I think could be 12mm, I'm sorry I dont have a mm guage and it's hard to tell on flat tape measure with the curve of pearl. The "M" logo is stamped 925, Majorica and Spain. One end of ball clasp is also stamped on interior rim with I think an M and 925 but cant see for sure. Never wore these, come in original box with original paperwork.