dub

Lub hnub qub dub lub hli lub ntsiab lus thiab cov khoom. Lub hnub qub tsaus ntuj hnub qub yog sodium sodium aluminium silicate nrog cov tshuaj lom neeg cov tshuaj (Na, K) AlSi3O8 thiab cov ... Nyeem ntxiv

Raw dub tourmaline siv lead ua pob zeb ntsiab lus. Dub tourmaline yog crystalline boron silicate ntxhia. Qee qhov kab kawm yog aluminium, hlau, kuj magnesium, ... Nyeem ntxiv