A package of eco ore on a zoomer.
Eco ore is a very rare form of eco only appearing in Jak II. Torn asked Jak to deliver a package of it to Krew in the mission "Make delivery to Hip Hog Saloon". Eco ore is highly sought after, with a squad of guards setting up two blockades in the city, as well as Krew stating that a package of it is worth "more than ten of [Daxter's] lives."[1] As it would seem, it is very rare and fairly hard to get to. Eco ore in its natural form was never seen, though the shipment in which Jak had to deliver was in the form of a small package box, so given eco ore's natural form this was probably the best way to ship it.