All participants in the jewellery and gemstone value chain will need to come to terms with the fact that basic due diligence demonstrating that they are sourcing their supply responsibly is becoming is a regular requirement for doing business, said Gaetano Cavalieri, President of CIBJO, speaking last week in Mumbai. At the same time, he added, the systems being developed must be inclusive, meaning that they cannot discriminate against ethical players because of their size or financial capacity.