Harmony Gold. Mining, South Africa, Gauteng, Johannesburg, Tier 1, Randfontein. Grid.,Airports Company South Africa ACSA Airport Company,,List of PLATINUM mining companies. 24hGold,List of PLATINUM mining companies with access to company profiles, projects, resources and reserves and technical analysis.Blanket Gold Mine Caledonia Mining,The Blanket Mine is located in the southwest of Zimbabwe approximately 15 km west of Gwanda, the provincial capital of Matabeleland South. Gwanda is 150 km south east of Bulawayo the countrys second largest city and 196 km northwest of the Beit Bridge Border post with South Africa, and 560 km from Harare, Zimbabwes capital city.