Games : is there a way to tell what mod an item/block originates from?

I have a number of mods and i know some of them added copper to the world. when mining i tend to find 2 kinda of copper core, ones with orange dots (Copper A) and ones with goldenrod dots (Copper B).

when i smelt these 2 ores i get 2 different ingots. in Industrialcraft when i crush Copper B Ore i get Crushed Copper Ore when wen smelted i get what i would get if i smelted Copper A ore.

now i've been storing Copper A Ingots as blocks in my factory as i suspect that Copper B was added by Railcraft. when i went to get some of Copper A out of a block the Ingots i got were a totally different colour to Copper A or B (but i could flatten it to make wires just the same as Copper A)

Now i would like to know which mod created not only third copper ingot came from but 2 different types of Tin Ore i've been getting. so i am wondering if there is a way to check what mod a particular block/item came from in game.