A laboratory-scale mechanical concentrating table designed for separating granular materials based on differences in specific gravity, shape, and particle size. The Model 13-A is a laboratory-sized unit capable of processing 30-50 pounds of feed per hour, with some configurations handling up to 150 lbs/hour. It features two distinct deck designs: a sand deck for particles sized from 20 mesh to +200 mesh (0.074 mm to 0.84 mm) and a slime deck for finer particles from 100 mesh to +325 mesh (0.044 mm to 0.149 mm). Separation is influenced by adjustable parameters such as table speed, stroke length, deck inclination, riffle height, and wash water volume. This table is widely used in metallurgical applications, mineral processing, soil remediation, and for recovering high-density minerals like precious metals, as well as lighter ores like coal. It can serve as a pilot table to monitor the efficiency of flotation units or for multi-mineral separations. Its reproducibility and scalability make it ideal for lab and pilot plant test work. The table is typically constructed with fiberglass and features adjustable stroke, tilt, and end slope.