A mining classifier assembly includes a round main body member with a flat bottom portion, preferably adapted to be received into the top portion of a round bucket or similar container, including a series of holes in the bottom portion thereof. The main body member may be placed into the top of a bucket that contains water. A load of dirt, containing rocks, minerals, gemstones, and the like, may be loaded into the main body member so that the water at least partially covers the load, and an operator may agitate the particulate within the water, so that the particulate small enough to fall through the holes in the main body member may fall through, while the larger particulate remains within the main body member. Additionally, a series of trays having a mesh bottom may be inserted into the main body member, to catch and separate smaller particulate.