3 - first Plateau on the way to the village.
4 - At the edge of some more rock plateaus on the way to the village.
3 - Close to the Oracle.
3 - In the crevice between Rockvillage and the Precursor Basin.
20 - In the Precursor Orb Container between the Oracle an the Geologist. To open this container you need some skills and a puzzlebrain:
Get the blue Eco behind the Geologist (well, behind the rock, stupid) and jump with lots of rollingjumps to the other blue eco behind the burning lava rock.
from there you rolljump to the Precursor Orb container. It is impossible to reach the Precursor Orb Container with only one Blue
Eco. (or not?
) ...(look down a bit)
7 - Above the bridge to the Swamp or the Precursor Machine.
6 - Above the bridge to the lost Precursor City.
4 - On the Island next to the entrance to the lost Precursor City.
50 - Precursor Orbs overall.
(°) BigBoyScout sent me the following mail concerning this Blue Eco Container:
I tried about 25-30 times using just the Blue Eco by the burning boulder
because it was a straight shot. I finally accomplished opening the Container
with just that one Blue Eco by using three rolling jumps and a quick extension
of Jak by hitting the "square" button.
Thanks to Leon Rios for mentioning that 4 rolling jumps also work and confirming
that this works, after I asked for confirmation.