First thing you would do is get yourself trained from one of the Jewelcrafting trainers in the main cities of old Azeroth. Just ask the guards and they will guide you to the exact location in your city.
Apprentice Jewelcrafting
1-30: Make 30 Delicate Copper Wire. Save these, you will need them later.
31-50: Here you have an option of either making 20 Tigerseye Band or 20 Malachite Pendant. The stats on these items are pretty good for low levels probably until 20 after which you might be upgrading these. Alternatively if you are just powerleveling on a higher level character you could check the auction house to see which one sell for more, or if you have an alt enchanter or a friend that is an enchanter you can get them disenchanted for consistent profits. This goes for all of the rings, necklaces etc.. that you are going to be making in your quest to 450.
Journeyman Jewelcrafting
51-80: Now make 50 Bronze Setting. Save these too, you will need them later for other stuff.
81-100: Here again you have 3 options. Choose from one of the following by deciding which would sell for most on the Auction House.
- Simple Pearl Ring
- Gloom Band
- Ring of Silver Might
101-110: Make 20 of these - Ring of Twilight Shadows. The stats on this is pretty good for self-use for its level.
111-120: 10 of Heavy Stone Statue.
121-150: 30 of these - Pendant of the Agate Shield. Moss Agate being used to make this, this could turn out quite a goldsink but you could sell them to some low level warrior, druid tanks to make most of the money back.
This design is sold by these NPC's.