You peeps are more experienced with other mods.

Iron is worth 1.6 Strange Matter.

If you are playing with any mod that adds ores, please suggest matter costs.

(looking at bob's ores and Uranium Power)

(EDIT) There are a lot of new ores, and I do not have gameplay experience, therefore I cannot judge how valuable an ore is. And arbitrary balance would make support almost stupid.

I play mostly with infinite ore patches, but judging from what I need to build the biggest production for: You need lead and zinc the most, along with titanium (rutile) and tungsten. As far as I can tell Bob is keeping his stuff relativly close to reality in terms of crafting processes, so I would suggest making rutile a bit more expansive, since it's rarer in general, maybe 2 matter/ore. Lead and zinc are common, as is tungsten so I would suggest to go with your default cost of 1.6matter/ore.
As for all the unmentioned ores, in my experience you don't need them in large quantaties thoughout the game, so I don't see anything wrong with going with your default value of 1.6/ore as well. Since the only things you tuned with lower costs are wood and stone I don't see any reason to tune any bob's ore under 1.6