Gold Concentrate | Results 1 - 12 of 12 . Shop from the world's largest selection and best deals for Gold Concentrate. Shop with confidence on !gold concentrate,Gold extraction - WikipediaHowever, froth flotation processes may also be used to concentrate the gold. In some cases, particularly when the gold is present in the ore as discrete coarse particles, a gravity concentrate can be directly smelted to form gold bars. In other cases, particularly when the gold is present in the ore as fine particles or is not.