RC Roberto Coin Four-Diamond Four-Petal Flower Four-Leaf Flower Earrings, made of brass with gold plating. Available in 6 colors: Gold and Black Onyx, Gold and Blue Lapis, Gold and Blue Pine, Gold and Rose Pink, Gold and Peacock Green, Gold and White Shell. Dimensions: Height 4.7 cm Top Width 0 cm Bottom Width 2.9 cm Thickness 0.4 cm (including the protruding flower center). Weight: approximately 9g.Roberto Coin, the Italian jeweler, presents the Princess Flower Collection. Just as the four-leaf clover represents Van Cleef & Arpels, the four-petal flower is one of RC's signature designs. Inspired by the decorative totems of Venetian palaces, the design features four elegant oval petals crafted from various materials, including diamonds, mother-of-pearl, and gold.