18K Yellow Gold Platinum Diamond Unusual Modernist Geometric Vintage Ring

Unusual fluid design, shaped as trapeze / modified square, very comfy on the finger

Yellow gold with platinum central stripe, the diamonds are also set in platinum

Size 6.25 to 6.5 - non-resizeable 

Weight 7.6 grams

Diamonds: Count 3, Princess and Tapered Baguette cut, approximate total weight is 0.60 ctw (estimated in the mounting)

Approximate measurements: the face measures 5.5 mm North to South, the center is elevated 6 mm above the finger

Stamped 18K, hallmarked with maker's mark - as shown