Make Gold with the Saronite Shuffle

The act of buying Saronite Ore and then prospecting it to make gold is often affectionately referred to as the saronite shuffle. This technique has been around for a long time but you can still make gold using it. When you prospect saronite ore you have a chance of getting 1-2 green gems and/or 1-2 rare blue gems. There are a lot of things that you can do with these gems. The simplest thing you can do is cut the gems you get from prospecting and then sell them in the auction house. If you get just one rare gem then you've probably covered the cost of the stack of saronite and the rest will be pure profit.
You can use the Sun Crystal, Bloodstone, Chalcedony and Huge Citrine to craft Bloodstone Band, Sun Rock Ring, Crystal Chalcedony Amulet and Crystal Citrine Necklace if you have 2 Crystallized Earths. I go into more detail about this technique here.

You can disenchant the rings/necklaces you made and then sell the materials in the auction house. If you have an enchanter then you can use these mats to make scrolls of enchants and sell those. The great thing is that scrolls and enchanting materials have no auction house deposit fee. This means even if you don't sell them you take no losses.

You can use a Bloodstone, Chalcedony and Eternal Air to transmute an Skyflare Diamond if you have an alchemist. Likewise you can use a Dark Jade, Huge Citrine and Eternal Fire to transmute an Earthsiege Diamond. Leftover Chalcedony, Shadow Crystal and Dark Jade can be used to make your Icy Prism. 

Back about six months ago the best thing to do was craft the greens and then disenchant them to sell the mats. On most realms the price of Infinite Dust, Greater Cosmic Essence and Dreamshards have fallen so low that it might not be as profitable as selling cut gems or other things. You will have to check the auction house on your realm to see which method will be most profitable to you. The more professions you have available to you the most option you have.