Metech International Limited, an investment holding company, engages in the health supplement, lab-grown diamond, and supply-chain management and services businesses in the People's Republic of China. It operates through Health Supplements Business, Lab-Grown Diamond, and Supply-Chain Management and Services segments. The Health Supplement Business segment provides wholesale of health supplements. The Lab-Grown Diamond segment manufactures and distributes lab-grown diamonds. The Supply-Chain Management and Services segment provides general wholesale trading of metal products, and management and advisory of recycling and supply chain services. It also offers engineering design and consultancy services in energy management and clean energy system, as well as one-stop training or solutions for production of lab-grown diamonds. The company was formerly known as Centillion Environment & Recycling Limited and changed its name to Metech International Limited in May 2012. Metech International Limited was incorporated in 1992 and is based in Singapore.