Marcel Tolkowsky did the math in 1919 and the proportions he calculated (table, crown, pavilion angles all optimized together) are still the benchmark for what an ideal cut diamond means.
Quality & Value
Art Deco and Retro-era dinner rings are among the most actively collected categories in the estate jewelry market. This is thanks to their combination of design ambition, material quality, and historical specificity. It makes them compelling acquisitions for buyers who recognize what those decades produced and why it hasn't been replicated.
A Storied Heritage
The Retro period runs from roughly 1935 to 1950 and is characterized by bold sculptural forms, large gemstones, and deliberate theatricality. Hollywood's golden age set the visual tone and the jewelry followed.