The bird has been interpreted as a dove, a popular theme in Cyclades. Islanders used to decorate their marble vessels and their jewelry with doves. 
Today, it is the symbol of peace and it is linked to concepts and ideas such as harmony, happiness, hope and purity.

Could be matched with:

White dove | Large
https://cycladic.gr/en/shop/item/6642

White dove | Small

https://cycladic.gr/en/shop/item/449