Marco BicegoSiviglia 18k Pink Sapphire Ring, MediumDetailsFrom the Siviglia Sapphire Collection. 18-karat yellow gold with signature hand-engraved finish. Faceted pink sapphire center. Pave diamond bezel. 0. 21 total diamond carat weight. 16mm face. Medium-gauge band. US ring size 7. Made in Italy. Designer About Marco Bicego: As a talented artisan from a family of goldsmiths, Marco Bicego was uniquely poised to start his eponymous jewelry line in 2000. The designer is hailed for his "guitar string" coils, colored gemstones, hand engraving, and Old World Italian craftsmanship.