戈(ge)壁老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi)俗稱“表(biao)皮(pi)(pi)(pi)貨”,屬于(yu)戈(ge)壁石(shi)(shi)(shi)(shi)的(de)(de)(de)一(yi)(yi)(yi)種(zhong);是(shi)(shi)在戈(ge)壁灘表(biao)面,經(jing)(jing)億萬(wan)年的(de)(de)(de)風(feng)吹日曬,風(feng)沙(sha)打磨,在石(shi)(shi)(shi)(shi)頭(tou)(tou)表(biao)層形成(cheng)天然的(de)(de)(de)老皮(pi)(pi)(pi),象瓷(ci)器釉(you)面一(yi)(yi)(yi)樣(yang),溫(wen)潤光亮。用手(shou)觸摸,好(hao)是(shi)(shi)嬰兒的(de)(de)(de)肌膚,瑩潤爽滑,手(shou)感極(ji)(ji)好(hao)。從九十年代初,到現在,近20年的(de)(de)(de)時間,當地(di)(di)農(nong)牧民,騎馬開車,已經(jing)(jing)把(ba)戈(ge)壁老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi),撿(jian)拾(shi)殆盡(jin)。現在市場(chang)上的(de)(de)(de)老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi),基本(ben)都(dou)是(shi)(shi)石(shi)(shi)(shi)(shi)農(nong)家里的(de)(de)(de)存貨。一(yi)(yi)(yi)旦(dan),這些存貨消化完(wan)。老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi)將(jiang)絕(jue)跡于(yu)市場(chang)。象瑪(ma)瑙(nao)質(zhi)地(di)(di)的(de)(de)(de)沙(sha)漠漆(qi)(也是(shi)(shi)老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi)的(de)(de)(de)一(yi)(yi)(yi)種(zhong)),一(yi)(yi)(yi)方極(ji)(ji)品(pin),在九十年代,也就(jiu)過(guo)千元。而現在,一(yi)(yi)(yi)方極(ji)(ji)品(pin),要百萬(wan)元之巨。看的(de)(de)(de)過(guo)眼的(de)(de)(de),也要幾(ji)十萬(wan),真是(shi)(shi)讓(rang)人始(shi)料未及。其增(zeng)值(zhi)的(de)(de)(de)速度令人咋(za)舌。很(hen)多戈(ge)壁石(shi)(shi)(shi)(shi)種(zhong),分地(di)(di)上品(pin)和地(di)(di)下品(pin),如碧玉(yu),瑪(ma)瑙(nao)等。地(di)(di)上沒有,地(di)(di)下卻儲量很(hen)大。唯獨老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi)只(zhi)能是(shi)(shi)在地(di)(di)表(biao),如在地(di)(di)下就(jiu)形不(bu)(bu)成(cheng)老皮(pi)(pi)(pi)。所(suo)以(yi),很(hen)容易被石(shi)(shi)(shi)(shi)農(nong)撿(jian)拾(shi)。一(yi)(yi)(yi)個石(shi)(shi)(shi)(shi)農(nong),撿(jian)一(yi)(yi)(yi)方極(ji)(ji)品(pin)沙(sha)漠漆(qi),就(jiu)有幾(ji)十萬(wan)的(de)(de)(de)收入(ru),你想(xiang)他會怎樣(yang)不(bu)(bu)辭行(xing)苦的(de)(de)(de)去撿(jian)石(shi)(shi)(shi)(shi)頭(tou)(tou)。所(suo)以(yi),老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi)絕(jue)跡是(shi)(shi)遲早(zao)的(de)(de)(de)事情。因此,老皮(pi)(pi)(pi)石(shi)(shi)(shi)(shi),無論(lun)從觀賞(shang)性,稀缺性,升(sheng)值(zhi)性來講,都(dou)是(shi)(shi)奇石(shi)(shi)(shi)(shi)中的(de)(de)(de)佼(jiao)佼(jiao)者(zhe)。
小的(de)(de)(de)老(lao)皮石(shi)(shi)(shi)(15CM以(yi)下)。一般(ban)(ban)是(shi)(shi)(shi)滿身(shen)(shen)皮。大的(de)(de)(de)老(lao)皮石(shi)(shi)(shi),一般(ban)(ban)是(shi)(shi)(shi)半身(shen)(shen)皮。因為,小石(shi)(shi)(shi)可以(yi)在沙漠中翻滾。而大石(shi)(shi)(shi)很(hen)難翻身(shen)(shen)。靠(kao)地的(de)(de)(de)一面,俗(su)稱“生面”,一般(ban)(ban)沒有皮。如果,大石(shi)(shi)(shi)(20CM以(yi)上)有滿身(shen)(shen)皮,就(jiu)很(hen)難得(de),那(nei)價格也就(jiu)高很(hen)多。如果得(de)到(dao)一方20CM左右的(de)(de)(de)戈壁石(shi)(shi)(shi),又是(shi)(shi)(shi)滿身(shen)(shen)老(lao)皮,而且是(shi)(shi)(shi)自己(ji)喜(xi)歡的(de)(de)(de)顏(yan)色,那(nei)是(shi)(shi)(shi)非常(chang)慶(qing)幸的(de)(de)(de),也很(hen)不容易。
老(lao)皮(pi)(pi)(pi)石(shi)(shi)(shi),從石(shi)(shi)(shi)質分,有瑪(ma)(ma)瑙,碧玉,石(shi)(shi)(shi)灰(hui)巖,馬牙石(shi)(shi)(shi)等。從顏色(se)(se)(se)看,有紅(hong)、黑(hei)、黃、綠、藍、灰(hui)等。色(se)(se)(se)彩比(bi)(bi)較(jiao)豐(feng)富。紅(hong)、黑(hei)、黃較(jiao)常見,也(ye)比(bi)(bi)較(jiao)漂亮(liang),受大多(duo)數人的(de)(de)喜愛(ai)。瑪(ma)(ma)瑙質地的(de)(de)紅(hong)黃色(se)(se)(se)老(lao)皮(pi)(pi)(pi),俗稱(cheng)“沙漠漆”,價(jia)值最高(gao)。一般石(shi)(shi)(shi)質的(de)(de)老(lao)皮(pi)(pi)(pi)石(shi)(shi)(shi),價(jia)格(ge)較(jiao)低。紅(hong)的(de)(de),有雞血紅(hong),橘紅(hong),絳紅(hong),深紅(hong)等。黑(hei)色(se)(se)(se)老(lao)皮(pi)(pi)(pi),也(ye)稱(cheng)“黑(hei)沙漠漆”,近(jin)年,也(ye)很受歡迎。其它顏色(se)(se)(se)的(de)(de)老(lao)皮(pi)(pi)(pi)石(shi)(shi)(shi),也(ye)有叫“戈壁(bi)彩石(shi)(shi)(shi)”,色(se)(se)(se)彩斑(ban)斕,煞是喜人。
老皮石,最(zui)忌有傷(shang)(shang),因大都(dou)石質較(jiao)脆(cui),很容易(yi)(yi)破損,新傷(shang)(shang)不(bu)易(yi)(yi)修復,如傷(shang)(shang)不(bu)大,在不(bu)重要的部位,稍好(hao)一(yi)些。老傷(shang)(shang)一(yi)般不(bu)影響(xiang)觀賞(shang)。