CORAL EARRINGS Sardinia. We have obtained some very rare antique, natural Sardinian Red Cora and have created a beautiful, free swinging design using these matching 11mm x 7mm cabs. The Silver work really highlights the rich, glossy red of this Coral as you can see in the images. Sardinian Coral is prized for its all-natural intense crimson red colour. These earrings weight 4.35g, they are 3.8cm long and 9mm wide.