This brooch, with its refined design and star shape, is inspired by the eponymous mathematics book, whose main subject is proportion, and its application in geometry and architecture. Its title is a reference to the golden number, which governs the harmonious relationship between the parties and the whole. It includes about sixty woodcuts, executed according to Leonardo da Vinci's drawings of regular solids. Created in an eco-responsible approach and manufactured in France in the heart of the Jura mountains.
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