You could save the concentrates and what I did was, I built a small water table out of scraps I had laying around and an old pump,I think I have maybe $25.00 in the table and I have run about 3 lbs of concentrate sorted in sizes from window screen to dust and recovered anything from 1/8" flakes to specs barely big enough to see without a magnifying glass.Make sure to use Jett dry in the water,once the table is set up properly,anything that floats or moves down the table is not gold.I am new to this as well and at first in my pan I thought mica was gold,but put it on a water table and it floats on past the gold.