That looks to be an anti-Chavez junk blog site that I would give no credibility.
We have discussed the possibility of a JV many times here and it does not hold water. VZ would have to pony up too much money and they are already going broke from social spending despite increased oil prices.
Moreover, Venezuela already owns 100% of LC and Crystallex is simply a contractor hired to extract minerals. All joint ventures applied to date have only been in the situation of a concession, and only then when the area was deemed strategic and had been privatized before Chavez came into office. Neither KRY or GRZ fall within such a group.