18KY SCHLUMBERGER TIFFANY & CO. SAPPHIRE AND EMERALD THISTLE BROOCH This late 20th century pin is comprised of full cut blue sapphire, and green emeralds set in 18kt yellow gold in this whimsically classic floral thistle themed design. This pin measures approximately 1.5" in height. Stamped by "Tiffany" "Schlumberger". This exceptional brooch was designed by Jean Schlumberger for Tiffany & Co. As one of the 20th century’s most gifted artists, Jean Schlumberger is renowned for his fantastical creations infused with wit and curiosity.