More Details Of Rare Origin Aviary Coral & Turquoise Birdcage Earrings Details Of Rare Origin earrings from the Aviary Collection. 18-karat yellow gold vermeil. Carved bone, natural and composite coral, and turquoise with floral birdcage motif. Naturally colored, cultured freshwater pearl accents. For pierced ears. Hand carved (may be slight variation between each piece). Made in Italy.