Metal: sterling silver (925)
Weight - approx. 12.5 gram (0,42 oz)

House Greyjoy's sigil is traditionally a golden kraken on a black field. Their house words are "We Do Not Sow," although the phrase "What Is Dead May Never Die" is also closely associated with House Greyjoy and their bannermen, as they are associated with the faith of the Drowned God.

Following the extinction of House Hoare, the ironborn elected House Greyjoy as Lord of the Iron Islands, an administrative region of the Seven Kingdoms, as vassals to House Targaryen. During Robert's Rebellion, House Greyjoy declared for House Baratheon. During the Greyjoy Rebellion, Balon Greyjoy declared sovereignty as the Kingdom of the Iron Islands and seceded from the Seven Kingdoms, but the rebellion was put down. House Greyjoy bent the knee to Robert Baratheon, and the Kingdom of the Iron Islands became defunct.

https://gameofthrones.fandom.com/wiki/House_Greyjoy