I love the jewel names, amethyst, tourmaline, emerald and aquamarine, given to this group of riverboats. La Turmalina, the ship on which we traveled is part of a fleet of four, built in the ship yard in Iquitos in the style of 19th century river boats. La Amatista and La Turmalina can take 30 passengers and La Esmeralda and La Aquamarina can take 17 and 24 passengers respectively. La Turmalina, our expedition riverboat is registered in Peru and operated by English speaking Peruvian Officers and crew.