Cov kev txiav dav dav yog forged los ntawm granite, lub tsev cov ntaub ntawv nrog super hardness thiab hnav tsis kam. Nws yog vim tias cov yam ntxwv ntawm granite uas nws nyuaj rau kev ua haujlwm. Hauv qab no yog kev nkag siab yooj yim ntawm cov yam tsis muaj zog uas ua rau cov khoom txiav hauv qhov txiav:
Pob zeb diamond me ntsis
Ua ntej, qhov ntsuas kub ntawm qhov taub thiab sab hauv qab ntawm cov hniav, cov hmoov ua thiab cov khoom tawg yooj yim ntawm lub siab melting taw tes ua rau kev hloov pauv ntawm kev ua haujlwm sintering thiab cov khoom siv kho tshuab hauv cov txheej txheem ntawm kev ua kom sov sintering ntawm granite pom hniav. Thib ob, hauv kev ua tiav, vim tias lub siab tawv ntawm granite, qhov kev co thiab qhov cuam tshuam ntawm lub zog granite pom hniav kov thiab kis tau rau lub cev lub cev muaj zog, uas ua rau txo qis ntawm kev tswj quab yuam ntawm lub log lub cev ntawm pob zeb diamond hais. Tom qab ntawd, nyob rau hauv tus txheej txheem ntawm kev txiav, lub tshav kub yuav txuas ntxiv mus ntxiv, thiab cov khoom siv cav ntawm granite pom hniav lub cev sintered yuav tsis muaj zog.
