The crafting recipe in question is the silver pickaxe crafting recipe. Ever since I started looking for it in the Mole Market and the Flea Market, I haven't been able to find it at all.
I found the Silver Wheel recipe just fine. But it's actually pretty funny, cause the moment I start wanting to find the Silver Pickaxe crafting recipe, it just- seems to not exist, lol! XD And it has not shown up in the Mole Market during any of the refreshes since I started wanting to learn that weird little recipe!
Is the Mole Market system meant to work like that? Only selling crafting recipes for apparel/items for crafting apparel for hours/days on end and only showing crafting recipes for mining items every week or so, once you reach a certain level in Mining? If it is, then it's... a bit of an inconvenience for those who have very few moonstones or any reliable way of getting moonstones through selling items for moonstones. Not too much of an inconvenience though, just to be clear! Nothing should be fixed, just because of this redundant complaint of mine!