Lub ntiajteb txawj nqus cov khoom siv tau siv dav hauv kev tsim khoom, nyiaj, taralum, tirconium, zirconium, thawj ore thiab chromium placers.
Qhov nruab nrab tau siv hauv JIG tshuab tuaj yeem yog dej, thiab thaum dej siv los ua cov khoom nruab nrab, nws yog hu ua kev sib cais nrog cov dej sib cais, uas txhim kho cov khoom sib cais ntawm cov ntawv thov ntau yam.