The Harappan settlement of Khanak is located in Bhiwani, India. Khanak has been excavated by the first author in collaboration with Cameron Petrei, University of Cambridge. From amongst the cultural materials recovered from two seasons of fieldwork at Khanak several samples related to metal production were selected for scientific studies. This included five fragments of crucible, four slag, two samples of copper celt and one sample of melt adhering to a potsherd. These were examined using SEM-EDS, EDAX & Petrological techniques. Thin-section petrography technique has played a crucial role in the provenance studies of the ancient ceramics and slag. First, when the non-plastic inclusions derive from distinctive igneous and metamorphic rocks, thin-section petrography of slag provides a predictive method for identifying the source of the raw materials used in metallurgy. Very occasionally, a particular ‘key’ inclusion allows one to identify the precise source of the raw materials, ores and minerals. Electron microscopy was used to study the surface and internal structure of the slag samples. The information acquired provides more detailed information than that obtained from the petrological analysis. The data that has emerged so far from the present and earlier analysis will be presented in the poster.