Request: Spellcrafting mechanics explained

Dear old-schoolers, dear crafting-testers,
I would be very happy about reliable in-depth information on how exactly the imbuepoint system and Spellcrafting sucess/fail works on Uthgard - especially when it comes to item- and gem quality in relation or addition to crafting skill needed plus material loss if the enchantment fails.
Thank you very much for that!
best
Lail
I would be very happy about reliable in-depth information on how exactly the imbuepoint system and Spellcrafting sucess/fail works on Uthgard - especially when it comes to item- and gem quality in relation or addition to crafting skill needed plus material loss if the enchantment fails.
Thank you very much for that!
best
Lail