The Poor Ores from the Railcraft mod. Normally, if you throw them in a furnace, they come out with 3 nuggets, which comes out to a 30% rate to normal ore. However, if you put the poor ore into the macerator, it comes out with 2 crushed ore, which comes out at a 100% rate to normal ore.
1) This makes no real sense. A poor ore deposit should have less ore than a normal ore deposit.
2) I was mining and I found a poor iron ore vein. Thing is, this one vein was gigantic. I now have an entire chest filled with poor iron ore, and there is still more to be mined. Poor ore veins tend to be larger than normal.
My suggestion is to make poor ores macerate at a 50% rate, meaning they produce only 1 crushed ore.
P.S. I'm rich now.