0 to  25 -- Rough Sharpening Stones (use) (rough stone x1)
 25 to  65 -- Rough Grinding Stones (save) (rough stone x2)
 65 to  75 -- Coarse Shapening Stones (coarse stone x1)
 75 to 100 -- Coarse Grinding Stones (coarse stone x2)
100 to 105 -- Silver Rods (2x rough grinding stone, 1x silver bar)
105 to 145 -- Rough Bronze Leggings (6x bronze bar) (buy bronze stacks for 30s or less)
145 to 150 -- Heavy Grinding Stone (3x heavy stone)
150 to 155 -- Iron Buckles (1x Iron Bar)
105 to 175 -- Rough Bronze Leggings (6x bronze bar)
180 to ___ -- Moonsteel Broadsword: x4 (steel bar x8, strong flux x2, heavy grinding stone x2, lesser moonstone x3, heavy leather x3) (recipe booty bay)
185 to ___ -- Massive Iron Axe: x4 (iron bar x14, strong flux x2, heavy grinding stone x2, gold bar x4, heavy leather x2) Vharr/GromGol
165 to 190 -- Iron Counterweight (coarse stone x4, iron bar x4, lesser moonstone x1)
___ to 210 -- Solid Grinding Stone (solid stone x4)
210 to ___ -- Heavy Mithril Axe: x2 (citrine x2, heavy leather x4, mithril bar x 12, solid grinding stone x1)
___ to 215 -- Golden Scale Bracers (steel bar x5, heavy grinding stone x2)
230 to ___ -- Big Black Mace: x2 (mithril bar x16, black pearl x1, shadowgem x4, solid grinding stone x1, thick leather x2)
235 to ___ -- Steel Plate Helm (steel bar x14, solid grinding stone x1)
___ to 250 -- Mithril Spurs (mithril bar x4, solid grinding stone x3)
250 to 260 -- Dense Sharpening Stones (dense stone x1) (rich thorium)
___ to 265 -- Ornate Mithril Helm
___ to 265 -- Ornate Mithril Boots
___ to 275 -- Mithril Spurs
___ to 280 -- Thorium Bracers
280 to 300 -- Thorium Boots?
___ to 300 -- Thorium Helms

Resources:
http://forums.worldofwarcraft.com/thread.aspx?fn=wow-professions&t=1&p=4