Ukungangeni kwesihlabathi se-garnet, iphuzu lokuncibilika eliphezulu, ukuqina okuhle, ukungancibiliki emanzini, ukuncibilika ku-asidi kungu-1% kuphela, ngokuyisisekelo akuqukethe i-silicon yamahhala, inokumelana okuphezulu nokusebenza komthelela ngokomzimba; Ubulukhuni bayo obuphezulu, ubukhali bomphetho, amandla okugaya kanye nobunzima obuthile...
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