Early 20th century ring with unheated natural sapphire and diamond

Period: Early 20th century
Metal: Gold 750/1000 (18 k)
Total weight (gross): 5.20 grams
Ring size: 51.5 (can be sized)
Diameter (ring head): 1.8 cm x 1.5 cm
Nature of the stones: Unheated natural sapphire of approximately 2 carats (Carat Gem Lab laboratory certificate indicating the absence of thermal modification, an intense blue color and a source of Sri Lanka formerly Ceylon), rose-cut diamonds
State of conservation: Very good state of conservation
Price: 4250 euros
Reference: 17 091 1