xim gemstones Nws hloov zuj zus los ntawm 3-ko taw liab, xiav thiab ntsuab lub xeev mus rau ntau qhov sib txawv.Qhov nce ntawm tus nqi ntawm qee lub pov haum tsis tshua muaj kev poob siab ntau dua.Tus nqi ntawm Colombian emeralds yog qhov tseem ceeb, thiab cov ntshav ntawm Burmese pigtails nyuaj rau yeej hauv kev rho npe.Qee qhov zoo cobalt spinels tau nce 200% mus rau 1000%.
Muaj ob lub laj thawj tseem ceeb rau tus nqi nce:
ntawm qhov tod tes vim muaj kev cuam tshuam ntawm kev sib kis Kev ncua ntawm kev tsim khoom hauv cheeb tsam mining tau ua rau cov nqi mining nce thiab cov khoom lag luam qis dua hauv cheeb tsam mining.Ntawm qhov tod tes, kev zoo siab ntawm lub pov haum cov neeg siv khoom lag luam tsis tau txo qis thiab yuav nce ntxiv tom qab xyoo tau nkag mus.2021 tiag tiag seb tus nqi siab dua lossis qis dua Qhov tseem ceeb tshaj plaws yog Tshuag.
Lub sij hawm xa tuaj: Plaub Hlis-19-2022