Sapphire Corporation Limited is a Singapore-based investment management and holding company. The Company, through its subsidiaries, is engaged in the engineering, procurement and construction, and mining services businesses. The Company's segments include Mining services and Infrastructure business. The Company operates Mining services segment through its subsidiary, Mancala Holdings Pty Ltd (Mancala), a mining services company, which offers drilling, shaft excavation and engineering services, among others. Mancala has completed over 100 projects in Australia and internationally, and operates a nickel mine in Vietnam. The Company operates its Infrastructure business segment through Ranken Infrastructure Limited and its subsidiaries (Ranken). Ranken is an integrated rail transport infrastructure group, and holds licenses for design, construction and project consultation in the rail sector. Ranken's clients include state-owned enterprises and Fortune-500 companies in China.