This is OLD method used in wotlk. This might be a repost but since there is 1k posts named ''ah doing nothing etc.etc.'' I CBA Search all of em. So save your ''repost''s and Ignore this instead if you see it useless.
So this is what I do.
First of all, Check your servers AH prices. If you see them on scale like this it will work in your realm:
Jasper 0-20Gold
Hypnotic dust 8+ gold each (160g stack)
Greater Celestial Essence 35+ Gold each (150gold stack)
Elementium ores MAX 100Gold stack. THIS depends on the prices of ALL Blue and Green QUALITY Gems on your realm.
I buy Jasper (Green quality gem) uncutted. All of em from AH by the price told above.
I make them to jasper rings. This sometimes proc and you get a BOE blue quality ring which sells for 50-250gold on my server. From 100 jaspers I get 10-20 of those. These BOEs are hard to sell all at once so do what you want but DO NOT DE them. Those Shards are low priced atleast here. You also need that vendor mat which is around 1 gold each from JC vendor for this ring.
When the Jasper rings are made you Disenchant them. You get 1-3 dust or 1-3 lesser essences from these. Dont worry if you get many times 1 dust in row. You WILL eventually get more gold than you used for the jaspers IF you followed this guide and bought the jaspers for the prices I told you.
Elementium ores? Prospect them. You get minimiun of 4 greens gems per stack which atleast gives the stack price you paid back to you when you sell them to AH. You can also get 2 green gems from one prospect and with a chance of 20% or something, a blue gem.
I HIGHLY advice to get recipes for those blue gems and cut them before selling them to AH to make much more profit.
This is about it I think
TooLongDidn'tRead?
1. Buy jaspers and elementiums
2. Make jaspers to gems, prospect the elementiums
3. DE the jaspers
4. Sell the enchanting materials and gems you got from prospecting
5. ????
6. Finally, PROFIT!!
Remember, the more you do this, the more you get money.
Imagine how much you make cash if the profit goes around 50% gold
and you buy jaspers worth of 5k gold. Thats 2.5k gold MINIMIUM profit in less than hour.
TIP: Gem prices goes down VERY fast so do not worry about jasper prices. I can see the prices after I have bought them until they cost 25g go down back to 10g in a hour. So be patient.
That is about it. HF making cash while half afk.