Why Can't I find some crafting recipes on my crafting log list?

I have attained level 50(Goldsmith),I wanna synthesis Dodore Ring,but I can't find it on my crafting log list,where is the problem?

Because the Dodore ring is a leatherworker recipe

Dodore Ring is leatherworking recipe, not goldsmith. And also, there are many master craft book you may need to purchase and learn to get even higher level recipes.

http://ffxiv.gamerescape.com/wiki/Dodore_Ring

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Originally Posted by Normalizer

Dodore Ring is leatherworking recipe, not goldsmith. And also, there are many master craft book you may need to purchase and learn to get even higher level recipes.

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This is the big one. There's currently three books per class available from Talan in Mor Dhona in exchange for trading in various crafted items, which will add additional recipes to your log: Mastercraft I, Mastercraft: Demimateria, and Mastercraft II.