Sterling Silver Irish Claddagh Earrings with Green Cubic Zirconia by Astra These Stunning Sterling Silver Irish Claddagh Earrings with Green Cubic Zirconia. Made by the renowned Astra. Astra are a sterling silver jewelry company based in Kilkenny since 1988 and have developed their range over a number of years. These earrings are crafted with the renowned Claddagh symbol and with an emerald green cubic zirconia stone. Elegantly Presented in a Gift Box, each earring measures 1.2mm x 1.1mm - A Perfect gift for any occasion. Designed in Ireland and delivered from Ireland to the US within 6-9 Days plus free Irish gift with every purchase.