Although mining and related sectors play a small role in terms of contribution to City GDP, opportunities exist in downstream beneficiation in the industry, as well as support services to mining companies and operations in adjacent regions. The City is an ideal location for jewellery manufacturers, given its central position with respect to deposits of the Platinum Group Metals (PGMs), gold and diamonds, mined in North West, Limpopo and other parts of Gauteng. The City already hosts numerous jewellery laboratories and receives from various tertiary institutions in this field. Other opportunities are in the metal and metal products industry, which makes the greatest contribution within 16 industrial estates, resulting in a high concentration of steel manufacturing companies in the City. This is largely driven by the construction sector, and linkages with the automotive sector through intermediate product supplies.