Bidspirit auction | Platinum 1960s 2.75ctw Purple Star

Platinum 1960s 2.75ctw Purple Star Sapphire & Diamond Halo Ring, 8.5 - Metal : platinum 900 Gross weight : 8.5 grams Ring size : 8.5 Primary stone : natural purple star sapphire cabochon                 – 2.40 ct (hallmarked) · approx. 8 × 6 mm                 – six-ray asterism visible under point light Accent stones : round brilliant diamonds, 0.35 ct total                 – estimated G–H colour / SI clarity Mount style : milled halo cluster with scalloped outer border Hallmarks : Pt 900 · “2.40 0.35” Era / origin : mid-Shōwa Japanese production, c. 1960s Condition : sharp milgrain and prongs intact