GTP is the Plansee Group’s main tungsten supplier. It is reportedly the world's first tungsten producer to receive this certificate.

The audit was carried out by the committee of the Electronic Industry Citizenship Coalition (EICC) and the Global e-Sustainability Initiative (GeSI) as part of the Conflict-Free Smelter Program (CFS), a joint undertaking promoted by the EICC and GeSI. 

“For Plansee's customers, the certificate provides independent proof that the Plansee Group procures its tungsten from reliable and responsible sources,” said the company in a press release.