GIA certified, buyer receives certificate below. Beautiful 2 carats natural grey and blue star sapphire, measures 8 X 7.65 mm, 3.9 mm depth. Ring is handmade and heavy at 15.2 grams, marked 18k, solid yellow gold. Ring is vintage 1960s, brutalist design school, Signed "LP" for Louis Perrier a renowned jeweler in Quebec, Canada. Finger size is a 9, design is 16 X 20 mm on top and band is 9mm wide all around. Certificate is signed and dated December 12th 2016 in Montreal, Canada.