Emerald Gemstones Art Deco Cartier emerald carved bead necklace with onyx, and diamonds. Circa 1925. Via Diamonds in the Library. 784229 784229

https://www.etsy.com/listing/290038721/18k-yellow-gold-unique-diamond-blue 784229VAN CLEEF & ARPELS Diamond and Turquoise Ear Clips More TURQUOISE, SAPPHIRE AND DIAMOND NECKLACE , BULGARI The necklace decorated to the centre with a pear-shaped motif in graduated lines of turquoise, cabochon sapphires and brilliant-cut diamonds, the central motif may be detached and worn as a brooch, signed Bulgari. Cartier……. Zoubida Ratata

Refer: http://elogedelart.canalblog.com/archives/2010/11/28/19729315.html