The crystal extractor is not currently working but I do have some information for you.
Whenever you world hop, the "Crystal extractor" is deactivated and will need to be activated each time. The available actions in this state, in order, are:
1. Activate
2. Examine
Once the "Crystal extractor" is activated it will have the following actions:
1. Harvest
2. Deactivate
3. Examine
The the available actions do not change depending on if it is ready to be harvested.
However, there is an in-game message every time it is ready to be extracted:
"Your crystal extractor has harvested a crystal mote!"
Additionally, it takes approximately 3-4 seconds to harvest it.
Let me know if you need anything else.