After digging for diamonds this past weekend (for our first time) we decided this is the essentials kit everyone needs:
Rain Pancho (in case of rain)
Digging tool from walmart (see picture)
Rent or bring a double sifting screen
Backpack/cooler with drinks and snacks
Rubber boots (in case of rain)
Ziplock bag (to keep any diamond possibilities in)
Have fun on your next expedition!