Itronics Inc (ITRO)

[saildone]

dounome, I'll answer your question.
Look here Itronics Master Profile
then go to section 1.7 titled Mining Subsidiary: Auric Mining Gold and Minerals.
There is a lot of information packed into a few paragraphs but the key takeaway is this; it has low holding costs and is being, strategically, held for long term development using the technologies that Itronics is currently bringing on line.

There is more information in section 3.3 titled Minerals division.
And more to be gleaned about the Fulstone project in section 4.1 and elsewhere I just recommend that you read the entire document.