The index looks at five-year averages of exchange liquidity and production data to determine which commodities are included and which weightings are assigned.
The world's fourth-biggest economy, Germany joins countries including New Zealand and France in calling for seabed mining exploration to stop until further research is done.
ITSCI is a private sector scheme monitoring tin, tantalum and tungsten mines in Democratic Republic of Congo, Rwanda, and Burundi for human rights abuses.