Currently, all of the metal blocks besides cobalt are just recolours of the gold/diamond block, and the gem blocks are just recolours of each other:

It would be much better if some more unique textures were given to each block, so each had its own sort of character.

It might be interesting if the base metals (titanium, zinc, tungsten, cobalt, thorium, uranium, plutonium, alumium, tin, steel, brass) were given harsher, more industrial textures somewhat like the iron block has, and the precious metals (copper, silver, platinum, palladium, osmium, iridium, electrum) were given perhaps more magical textures or something.

Closing this ticket since Cotton Resources is pretty much a discontinued project from the time being - feel free to reopen this if work continues

a few metals already have additional textures; it'd be best to categorize the metals and have 3-4 model types based on rarity and shared properties.

Really don't feel like it's worth the effort, honestly.