It depends on the gems, but lots of raw go for around 180, and cut can go anywhere from 160 - 260 depending on the cut. Having a good diversity and checking a lot is key. If you find cheap gems, buy them all, cut them, send them to a bank. When that gem gets a good sales rate, sell hard and fast. Then hold off when the rate is bad, don't cut yourself short.
Oh also, its too late but now, but some of us bought a _ton_ of uncut gems knowing that the price was going up :P So on certain cuts, it might even look like certain cut gems are less than the uncut, but you have to remember that if you had bought the uncut a few weeks ago, you're still making a killing on them right now :P
On my server, for some reason the orange are a good profit of uncut to cut right now. Red are both expensive so you only make between 20 - 40g per sale.