鵝卵石主要化(hua)學成分(fen)是(shi)(shi)二氧化(hua)硅(gui),其(qi)次是(shi)(shi)少量(liang)氧化(hua)鐵和微量(liang)錳(meng)、銅(tong)、鋁、鎂等(deng)元(yuan)素及化(hua)合(he)物。它(ta)們本(ben)身(shen)具有不(bu)同(tong)(tong)色(se)(se)素,如(ru)赤(chi)紅者(zhe)為(wei)(wei)鐵,藍者(zhe)為(wei)(wei)銅(tong),紫者(zhe)為(wei)(wei)錳(meng),黃色(se)(se)半透明為(wei)(wei)二氧化(hua)硅(gui)膠體石(shi)髓,翡翠色(se)(se)含綠色(se)(se)礦物等(deng),由于這(zhe)些色(se)(se)素離子溶入(ru)二氧化(hua)硅(gui)熱液(ye)中種類和含量(liang)不(bu)同(tong)(tong),因而(er)呈(cheng)現出濃(nong)淡、深(shen)淺變化(hua)萬千的(de)色(se)(se)彩,使鵝(e)卵石(shi)呈(cheng)現出黑、白、黃、紅、墨綠、青(qing)灰等(deng)色(se)(se)系,它(ta)是(shi)(shi)由水(shui)流(liu)形(xing)成的(de),水(shui)流(liu)經過的(de)地方石(shi)頭也不(bu)同(tong)(tong),經水(shui)流(liu)不(bu)斷沖(chong)洗(xi),形(xing)狀顏色(se)(se)也不(bu)同(tong)(tong)。