Adele’s husband is a miner so she know he has tools for carving stone in his house.

She have seen Adele carving medallions before outside her house. (So she has the skill to do it)

She knows Adele’s husband is away a lot, so she has a lot of time to perform witchcraft secretly.

Adele lives next to her so she would have been able to bury the orb easily without being spotted.