看见外福来急得直挠头,地质学家叔叔干脆停下手中的活儿,拉着他坐下来。“别急,我们试着在这块花岗岩上找找原因。你刚才在这块花岗岩上找到了哪几种颜色呢?”叔叔边说边用手在书包里摸着什么。“黑、白和肉红色。”外福来不再着急,好奇地瞪着眼睛瞅。“你知道吗?花岗岩的这三种颜色分别来自三种矿物——石英、长石、云母。”叔叔终于从书包里掏出些东西,正是石英、长 Seeing the outsider anxious to scratch his head, the geologist uncle simply stopped his job and took him to sit down. “Do not worry, we try to find the reason for this granite.What color you just found on this piece of granite?” “Uncle said while touching his bag with what. ”Black, white and red meat. “ The blessing to no longer in a hurry, staring curiously glanced. ”You know? The three colors of granite come from three kinds of minerals - quartz, feldspar, mica.“ ”Uncle finally pulled out something from the bag, it is quartz, long