Haze strains tend to be mostly Sativa, ranging from 80-100%.

Blueberry is 80% Indica.

What you have there is probably close to a 50/50 mix of Indica/sativa, but nonetheless, that sounds like an amazing cross.

Pure blueberry alone is very potent, but crossed with some Haze, thar must be amazing shit.

If I were you I wouldn't bother buying a gram and buy some more in bulk and get your moneys worth.