1 hour sluice box cons

Experience the excitement of working real gold-bearing material straight from a rich California gravel bar. This paydirt is made from approximately one hour of sluice concentrates, combined with natural, unsearched dirt and gravels collected from highly productive gold-bearing ground.
Each bag contains concentrates from roughly two buckets of material, giving you a realistic prospecting experience right from home. Every bag is packed with a natural mix of sands, gravels, and heavy concentrates, just as they come from the river.
Gold is guaranteed in every bag, although no specific amount is guaranteed. Because this is real field-collected material, gold recovery will vary from bag to bag, adding to the excitement of the hunt.
You may find:
Fine flour gold
Small flakes and pickers
Larger pickers ("pokers")
Quartz and other heavy concentrates
The possibility of small nuggets