3．對于(yu)輕微擦(ca)傷的(de)(de)(de)大(da)理(li)(li)(li)(li)石(shi)家具(ju)，可(ke)用(yong)(yong)專門(men)的(de)(de)(de)大(da)理(li)(li)(li)(li)石(shi)清潔劑(ji)和護理(li)(li)(li)(li)劑(ji)；磨損嚴重的(de)(de)(de)大(da)理(li)(li)(li)(li)石(shi)家具(ju)難以處理(li)(li)(li)(li)，可(ke)用(yong)(yong)鋼絲(si)絨擦(ca)拭(shi)，然后(hou)用(yong)(yong)電動磨光(guang)(guang)機(ji)磨光(guang)(guang)，使它恢復原有的(de)(de)(de)光(guang)(guang)澤。對于(yu)古舊或(huo)貴重的(de)(de)(de)大(da)理(li)(li)(li)(li)石(shi)家具(ju)應請人員處理(li)(li)(li)(li)。4、油(you)了漆(qi)的(de)(de)(de)大(da)理(li)(li)(li)(li)石(shi)家具(ju)必須(xu)用(yong)(yong)漆(qi)層剝離劑(ji)處理(li)(li)(li)(li)，并(bing)按照產(chan)品說(shuo)明進行。清除了全部油(you)漆(qi)后(hou)，就用(yong)(yong)鋼絲(si)絨擦(ca)拭(shi)和用(yong)(yong)電動磨光(guang)(guang)機(ji)磨光(guang)(guang)。

商業用(yong)花(hua)崗(gang)(gang)巖(yan)(yan)(yan)(yan)(yan)包(bao)括(kuo)前述之(zhi)花(hua)崗(gang)(gang)巖(yan)(yan)(yan)(yan)(yan)、片(pian)(pian)麻巖(yan)(yan)(yan)(yan)(yan)，片(pian)(pian)麻花(hua)崗(gang)(gang)巖(yan)(yan)(yan)(yan)(yan)、花(hua)崗(gang)(gang)片(pian)(pian)巖(yan)(yan)(yan)(yan)(yan)及學者所稱之(zhi)正長(chang)(chang)巖(yan)(yan)(yan)(yan)(yan)、花(hua)崗(gang)(gang)閃長(chang)(chang)巖(yan)(yan)(yan)(yan)(yan)的成(cheng)(cheng)分(fen)介于其(qi)間之(zhi)巖(yan)(yan)(yan)(yan)(yan)石(shi)(shi)。片(pian)(pian)麻巖(yan)(yan)(yan)(yan)(yan)類(lei)之(zhi)巖(yan)(yan)(yan)(yan)(yan)石(shi)(shi)包(bao)括(kuo)礦(kuang)物成(cheng)(cheng)分(fen)、類(lei)似花(hua)崗(gang)(gang)巖(yan)(yan)(yan)(yan)(yan)及具(ju)粒狀(zhuang)結晶組織者。商業用(yong)花(hua)崗(gang)(gang)巖(yan)(yan)(yan)(yan)(yan)亦包(bao)括(kuo)其(qi)它類(lei)似之(zhi)組織、含少量副成(cheng)(cheng)分(fen)礦(kuang)物之(zhi)長(chang)(chang)石(shi)(shi)質結晶巖(yan)(yan)(yan)(yan)(yan)，大(da)理(li)石(shi)(shi)樓梯，主(zhu)要為裝飾用(yong)者，如巖(yan)(yan)(yan)(yan)(yan)石(shi)(shi)學者所稱之(zhi)鈣斜長(chang)(chang)石(shi)(shi)。片(pian)(pian)麻巖(yan)(yan)(yan)(yan)(yan)為具(ju)粗理(li)之(zhi)結晶質巖(yan)(yan)(yan)(yan)(yan)石(shi)(shi)，主(zhu)要由硅(gui)酸鹽類(lei)礦(kuang)物組成(cheng)(cheng)，呈鑲嵌狀(zhuang)及粒狀(zhuang)結晶組織，不同類(lei)之(zhi)礦(kuang)物以(yi)規則(ze)或不規則(ze)，相城區大(da)理(li)石(shi)(shi)，交互排(pai)列而造成(cheng)(cheng)。

A類(lei):優異的大(da)理(li)(li)石，具有相(xiang)同(tong)(tong)的、很好的加(jia)工(gong)品質，大(da)理(li)(li)石生產(chan)廠家，不含雜質和(he)氣孔。B類(lei):特征(zheng)接近類(lei)大(da)理(li)(li)石，大(da)理(li)(li)石地面，但加(jia)工(gong)品質比(bi)前者略差(cha);有天然瑕(xia)疵;需(xu)要(yao)進行(xing)小量分(fen)離、膠粘和(he)填充(chong)(chong)。C類(lei):加(jia)工(gong)品質存在一些差(cha)異;瑕(xia)疵、氣孔、紋理(li)(li)斷裂較為(wei)常(chang)見。修補這(zhe)些差(cha)異的難度中(zhong)等，通過分(fen)離、膠粘、填充(chong)(chong)或者加(jia)固這(zhe)些方法(fa)中(zhong)的一種(zhong)(zhong)或者多(duo)種(zhong)(zhong)即可實(shi)現。D類(lei):特征(zheng)與C類(lei)大(da)理(li)(li)石的相(xiang)似，但是它含有的天然瑕(xia)疵更多(duo)，加(jia)工(gong)品質的差(cha)異至大(da)，需(xu)要(yao)同(tong)(tong)一種(zhong)(zhong)方法(fa)進行(xing)多(duo)次表(biao)面處理(li)(li)。這(zhe)類(lei)大(da)理(li)(li)石連累了許多(duo)色彩豐富的石材，他們具有很好的裝飾價值。