Each recipe is orange until its yellow rank and grey from its grey rank. When the ranks differ, it turns green somewhere between the two; the client files give both ranks but not that point. Equal ranks go straight to grey.

Blacksmithing: Reagents
RecipeMakesReagentsNeedsSkill-up
Rough Grinding Stone
Rough Grinding StoneYellow 45Grey 85
Coarse Grinding Stone
Coarse Grinding StoneYellow 50Grey 75
Heavy Grinding Stone
Heavy Grinding StoneYellow 100Grey 125
Iron Buckle
2 × Iron Buckle
  • Blacksmith Hammer
  • Anvil
Yellow 125Grey 130
Solid Grinding Stone
Solid Grinding StoneYellow 175Grey 185
Inlaid Mithril CylinderTaught by Plans: Inlaid Mithril Cylinder, requires 200
Inlaid Mithril Cylinder
  • Blacksmith Hammer
  • Anvil
Yellow 200Grey 225
Dense Grinding Stone
Dense Grinding StoneYellow 230Grey 235

From the Forever beta client files, build 1.60.1.70630: the SkillLine, SkillLineAbility, TradeSkillCategory, SpellReagents, SpellEffect, SpellTotems, SpellCastingRequirements and ItemEffect tables.

One more recipe in this category is encrypted in this build.