Resources in Argentina

I enjoy the steady flow of jeweler’s tips I receive from Ganoksin!
Here is a specific question I’ve been wondering about:

I will be traveling to Buenos Aires and I am wondering if Argentina
is known for any semi-precious stones that I should be looking for.
In addition, perhaps there is a jewelry artist whose work is not to
be missed. I would love to hear any comments!

Thank you -
Suzanne Santos
Riverwoods, IL