That’s funny because i’ve yet to play a world where tetrahedrite wasn’t practically under my feet where i started.
And then another one a few chunks away, and another and another…
But cassiterite… DAMN! On this world i’ve found 3 very small (disfigured) veins in a 3x3 km area.
MASSIVE tetra veins though. I’ve always thought they were impossible to MISS.
EDIT: Oh and as for Galena, i’ve had a really hard time finding them when i NEED them (early on) but late game i’ve found at least a dozen.