Rare coltan mineral, crucial for manufacturing cell phones, laptops, and other communication devices, has been discovered in commercial quantities in Kenya. Adequate deposits of coltan have been found in six counties.Coltan is used primarily for the production of tantalum capacitors, used in mobile phones, laptops and almost every kind of electronic device.Its discovery in Kenya is set to raise the country’s profile as a mineral exporter.The Mining and Blue Economy Cabinet Secretary (CS) Salim Mvurya made this known on Wednesday. According to him, adequate deposits of coltan have been found in…