* 1-30
Rough Stone Statues (10 Rough Stone)
Delicate Copper Wire (2 Copper Bars)
Prospecting (regular skill-ups to about 50)

* 30-65
Malachite Pendant (1 Delicate Copper Wire, 1 Malachite)
Tigerseye Band (1 Delicate Copper Wire, 1 Tigerseye)
Coarse Stone Statue (10 Coarse Stone)
Bronze Setting (2 Bronze Bars)

* 65-90
Elegant Silver Ring (2 Silver Bars)

* 90-100
Heavy Silver Ring (2 Silver Bars)

* 100-140
Ring of Twilight Shadows (2 Bronze Bars, 2 Shadowgem)
Heavy Stone Statue (10 Heavy Stone)

* 140-155
Gold Dragon Ring (1 Jade, 2 Gold, 2 Copper Wire)

* 155-175, 180-185
Mithril Filigree (2 Mithril Bars)

* 175-180
Solid Stone Statue (10 Solid Stone)

* 185-215
Engraved Truesilver Ring (1 Truesilver Bar, 2 Gold Bars)

* 215-220
Truesilver Commander’s Ring (3 Truesilver Bars, 2 Star Rubies, 2 Citrine)

* 220-225
Aquamarine Signet (3 Aquamarine, 4 Flask of Mojo)
(Should have made this from 215 or even 210 – orange the whole way to 225 - but I resisted going to farm the Mojo on the test server until I didn’t have any choice.)

* 225-236
Dense Stone Statue (10 Dense Stone)

* 236-250
Thorium Setting (3 Thorium Bars)
Ended up making far more than 20, so could have squeezed a few more points out here, probably 5 or 10.

* 250-274
Ruby Pendant of Fire (1 Thorium Setting, 1 Star Ruby)
Probably worth it to keep making this until you run right out of rubies or it turns grey, since you end up with a lot of them from mithril and thorium ore.

* 274-281
Simple Opal Ring (2 Large Opal, 2 Thorium Bars, 1 Thorium Setting)

* 281-285
Glowing Thorium Band (2 Azerothian Diamonds, 1 Thorium Setting, 1 Thorium Bar)

This is the list of materials I’m planning on having on-hand for when the expansion hits. Gems could be substituted for ore of the appropriate level, but some of the low level ones like Shadowgem are dirt cheap at auction now.

* 80 Rough Stone (4 stacks)
* 160 Copper Bars (8 stacks)
* 40 Malachite (2 stacks)
* 20 Tigerseye (1 stack)
* 80 Bronze Bars (4 stacks)
* 80 Silver Bars (4 stacks)
* 80 Shadowgem (4 stacks)
* 80 Heavy Stone (4 stacks)
* 120 Gold (6 stacks)
* 15 Jade (.75 stacks)
* 50 Mithril Bars (2.5 stacks)
* 60 Solid Stone (3 stacks)
* 45 Truesilver Bars(2.25 stacks)
* 30 Aquamarine (1.5 stacks)
* 40 Flasks of Mojo (2 stacks)
* 160 Dense Stone (8 stacks)
* 20 Star Rubies (1 stack)
* 100 Mithril Ore (5 stacks)
* ~200 Thorium Bars (10 stacks)
* ~250 Thorium Ore (25 stacks)

Source: http://wow.mmblog.eu