Yes, the thing that makes them cheap is that nothing else than 3x3 is required.
Diamond 3x3 axe can 1-hit T3 trunk, bark drop rates on T3 are 75% that of a T6, but a 3x3 diamond axe shouldn’t cost 75% of a T6 1-hit axe so it’s more coin efficient.
Shimmering orbs drop the same on T1 as on T6, downside is that you do need more bombs on T1 since growth spots are small on T1 planets. Bombs aren’t that expensive though, you’ll make your money back with just chrysominting the growth. 1800 orbs/h on T1 with a 3x3 only gem shovel. 30k growth too, which mints to 15k coin
Titanium shovels on T1/T2 also 1-hit all soft stuff, peat (cheap fuel btw), silty, clay, sand etc. Ash and growth are harder materials so titanium doesn’t 1-hit it, but any gem tool (aside from amethyst) does.