I would like to suggest, as a helpful aide to the new crafting systems, a series of handy guidebooks; not for recipes, but for ingredients. Walk with me:

In the same way you use Conjuration Sand to identify reagents for summoning, there should be an item available to identify ingredients for various crafting sets: Cookbooks with a list of well-known ingredients; herbalism guides with a list of common herbs and fungi in the 'dark, etc. The key, though, will be that instead of just giving the players a list, you use the guide item on a possible ingredient, and it tells you if it is one. For example, if you didn't already know Bluecap Fungus spores were an ingredient in cooking, you'd use the cookbook on the spores and learn that yes, somehow, you can use these to make something.

This will make the system just a little more friendly to beginners and veterans alike, without giving too many of the secrets away.

This sounds good to me - and since there's already the conjuration sand tool for summoning it makes sense. But conjuration sand has a limited number of uses.

Now you just have to come up with an appropriate item that would tell you that information.

Maybe a tiny underdark insect in a jar that goes beserk when near something edible? And after certain number of "uses" the insect dies from starvation in the jar.

And for herbalism some kind of litmus paper type test?

I like the bug-in-a-jar.

For clerics, they could just have an ability to sense if something is divinely inspired for consecration, along the lines of Detect Evil except doing so for an item's power.

Herbalism itself tends to be mysterious and unlike both cooking and consecration, so leaving it so is understandable.