Rangkachak leh tangkarua hian physical leh chemical property nghet tak an neih avangin leh nature-ah element awlsam tak angin an awm avangin, rangkachak leh tangkarua thianghlim tlemte siam chhuah nan hian technique buaithlak tak tak a ngai lo. Chuvangin an hmuchhuak hma hle a, insumdawn tawnna atan pawisa atan an hmang ta a ni. Hun a kal zel a, nun tak takah kan tawn tangkarua chu tangkarua thianghlim chauh a ni tawh lo. Mihringte chuan an finna hmangin tangkarua chu thil dang nen an pawlh a, chu chuan a thatna tam tak a pe a, chu chu a khauhna a tipung a, oxidation a do theihna a tipung a ni. Tunlai hian tangkarua chi hrang hrang a awm a, tangkarua thianghlim 10,000, tangka 990, tangka 925, Thai tangkarua, Miao tangkarua, Tibetan tangkarua, leh a dangte pawh a awm.
Tangkarua chungchang sawi dawn chuan tangkarua thianghlim hi kan rilruah a lo lang hmasa fo thin a, mahse tun dinhmunah chuan tangkarua 925 hi a lar ber a ni. Tangkarua thianghlim hi duhthlanna lar tak a nih laiin, naupang leh hmeichhe tam tak chuan chuta siam bracelet an ha a, mahse a chhiatna a nei bawk a, chu chu a oxidize duhna leh a khauh loh vang te hi a ni. Chuvangin nitin nunah tangkarua thianghlim kan hmuh hi a tam zawk chu bracelets a ni. Bracelets hi a thuk tawk avangin, pure silver hi a nem deuh mahse, khawih tlemte pawhin a deform dawn lo.
Mahse, tangkarua thianghlim hi thil nalh tak tak, bengbeh ang chi atan chuan a tha lo. Chuvangin hnathawktute chuan an finna hmangin tangkarua chu thil dang nen an pawlh a, a khauhna a tipung a. 925 tangkarua hi thir dang dah belhin siam a ni a, tangkarua awm zat chu 92.5% a ni a, thir dangte chu 7.5% a ni. Hei hian tangkarua chu a khauh tawk a, jewelry tha tak tak thenkhatah pawh hman theih a ni.
