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上(shang)(shang)水(shui)石(shi)(shi)(shi)(shi)的(de)實(shi)質(zhi)是碳(tan)酸(suan)鈣(gai)苔蘚植(zhi)物化石(shi)(shi)(shi)(shi)，暄(xuan)而(er)又(you)脆(cui)，良好的(de)吸(xi)(xi)(xi)水(shui)石(shi)(shi)(shi)(shi)吸(xi)(xi)(xi)水(shui)性特(te)別強(qiang)。上(shang)(shang)水(shui)石(shi)(shi)(shi)(shi)由于暄(xuan)而(er)脆(cui)易于造型，可(ke)隨意鑿槽、鉆洞(dong)、雕(diao)刻(ke)出各(ge)式各(ge)樣的(de)形狀。上(shang)(shang)水(shui)石(shi)(shi)(shi)(shi)天然(ran)洞(dong)穴(xue)很多，有的(de)互相(xiang)穿連通氣，小的(de)洞(dong)穴(xue)如氣孔，這就是吸(xi)(xi)(xi)水(shui)性強(qiang)的(de)主要(yao)原因。在(zai)上(shang)(shang)水(shui)石(shi)(shi)(shi)(shi)上(shang)(shang)的(de)洞(dong)穴(xue)中(zhong)，填(tian)上(shang)(shang)泥土可(ke)植(zhi)花(hua)草，大的(de)洞(dong)穴(xue)可(ke)栽樹木，由于石(shi)(shi)(shi)(shi)體吸(xi)(xi)(xi)水(shui)性強(qiang)，植(zhi)物生長茂盛，開花(hua)鮮(xian)艷。上(shang)(shang)水(shui)石(shi)(shi)(shi)(shi)可(ke)以(yi)散發濕氣，用它造假山或盆景，都(dou)有濕潤(run)環境(jing)的(de)作用。

上水石(shi)(shi)(shi)又稱(cheng)吸水石(shi)(shi)(shi)，盆中蓄水后，頃刻可(ke)吸到頂端(duan)。石(shi)(shi)(shi)上可(ke)栽植野草、蘚(xian)苔，青(qing)翠蒼潤，為制(zhi)作盆景的佳石(shi)(shi)(shi)。 沙(sha)積石(shi)(shi)(shi)，暄(xuan)而脆，但吸水性很強；石(shi)(shi)(shi)灰石(shi)(shi)(shi)硬(ying)度(du)稍高，結構比(bi)沙(sha)積石(shi)(shi)(shi)細(xi)密。上水石(shi)(shi)(shi)易于造型(xing)，由于暄(xuan)而脆，可(ke)隨意鑿槽、鉆洞、雕刻出(chu)心中理想的形(xing)象。