When you want to find Gold, Gems or precious stones a good set of sieves is essential. These quality Sieves with a 6mm (1/4") and (2.5mm) 1/8" stainless Steel mesh in an Aluminium housing are ideal to sort the treasure from the trash. Sieving can be done dry or wet and with a little practice and the right location, you will be plucking out gold & gems in no time at all. If you are gold panning, simply place the Sieves over the top of your pan under the water while you are shaking classify the material. Any large nuggets of gold will fall to the bottom of the Sieve & fine gold will fall through to the pan. Whether you are searching for gold or gems, with a bit of practice you will be able to "Flip" the sieve onto the ground and pick any gems or big nuggets (luck you !) off the material that is now on the top of the pile.