The Tourmaline Brotherhood is a powerful guild of merchant princes within Qarth. They battle for prominence in the city with the Thirteen, the Ancient Guild of Spicers, and the Pureborn. The Brotherhood owns approximately eight hundred ships. According to Xaro Xhoan Daxos the Brotherhood is full of pirates.
A Clash of Kings
The Tourmaline Brotherhood gives Daenerys Targaryen a crown wrought in the shape of a three-headed dragon, the symbol of House Targaryen. The coils are made of yellow gold, the wings are made of silver, and the heads consist of jade, ivory, and onyx.
A Storm of Swords