Ibice byingenzi bigize ibirahuri byamabara ni isuku ya quartz umucanga na potasiyumu feldspar, albite, okiside ya okiside (igice cyibanze cyikirahure), umunyu wumunyu (nitrati ya potasiyumu: KNO3; gukonjesha), ibyuma bya alkali, ubutare bwa alkaline (magnesium chloride: MgCl, imfashanyo yo gushonga , kongera igihe kirekire), okiside ya aluminium ...
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