Tsis yog, marble yuav tsis tau tawg pob tshab li iav.Txawm li cas los xij, qee hom marble tuaj yeem ua tautranslucentThaum txiav rau hauv nyias cov pob zeb.
Ntawm no yog ib qho kev puas tsuaj ntxaws ntxiv ntawm vim li cas:
1. Kev kawm ntawm marble: Vim li cas nws yog opaque
Marble yog cov metamorphic pob zeb uas cov qauv thaum limeson tau raug kom sov thiab siab. Cov txheej txheem no Recrystallizes cov calcium carbonate (calcium carbonate (calcium) cov zaub mov) nyob rau hauv cov khoom lag luam qub.
- Crystalline qauv:Lub recrystallization tsim ib qho kev sib tshuam mosaic ntawm calcite muaju. Thaum twg ib tug neeg calcite tuaj yeem ua pob tshab, thaj tsam ntawm cov lab ntawm cov muaju me me ntawm cov lus qhia sib txawv.
- Impurities:Marble yuav luag txhua lub sijhawm muaj cov impurities zoo li av nplaum, silt, xuab zeb, hlau oxides, thiab lwm yam meterals. Cov impurities no, uas muab marble nws cov leeg zoo nkauj thiab xim, yog opaque thiab thaiv cov zaj ntawm lub teeb.
Qhov kev sib xyaw ntawm cov qauv polycrystalline thiab kev siv tau impurities yog vim li cas ib daim tuab ntawm marble yog tag nrho opaque. Lub teeb tsis tuaj yeem taug kev los ntawm nws hauv txoj kab ncaj nraim.
2. Qhov kev zam: translucency hauv nyias shabs
Qee qhov ntshiab heev, nplua - nplej zom cov moj bwb dawb tuaj yeem nthuav tawmkev txhais ua.
- Nws ua haujlwm li cas:Thaum cov poj niam zoo nkauj no tau txiav rau hauv cov pob zeb me me (feem ntau 1-2 cm lossis tsawg dua rau qee cov ntawv thov, thiab txawm tias muaj teeb pom kev zoo), lub teeb tuaj yeem nkag mus rau sab nraud txheej.
- Cov nyhuv:Koj tsis tuaj yeem pom cov duab ntshiab los ntawm nws nyiam los ntawm lub qhov rai (pob tshab), tab sis lub pob zeb yuav ci thiab tso cai rau kev sib deev dhau los ntawm (translucency). Qhov no yog vim li cas qee qhov moj bis, zoo liStatuariolos ntawm Ltalis lossisTha nchoLos ntawm tim Nkij teb chaws, yog heev prized rau backlit feature phab ntsa, cov teeb meem, thiab cov vaj huam sib luag thiab translucent.
Marble vs. Lwm lub pob zeb: Hom tsis meej pem
Tib neeg feem ntau ua txhaum rau lwm cov pob zeb translucent rau "pob tshab marble." Cov piv txwv uas feem ntau yog:
- Onyx:Qhov no yog lub pob zeb feem ntau tsis meej pem rau pob tshab marble. Qhov tseeb Onyx yog daim ntawv banded ntawm chalcedony (ib hom quartz). Txawm li cas los xij, hauv pob zeb thiab tsim qauv, dab tsi feem ntau muag raws li "Onyx" lossis "pob zeb sib txawv, sib txawv:Calcabaster.
Calcabasteryog tsim los ntawm evaporation dej hauv tej qhov tsua (cov txheej txheem sedimentary), tsis yog los ntawm kev metamorphism zoo li marble. Nws muaj ntau yam ntau dua cov qauv crystalline nrog tsawg dua lub teeb- Cov pob zeb loj, uas ua rau nws tau txoj kev mus cuag tau yooj yim heev. Nws cov nkauj zoo nkauj yog tshwm sim los ntawm cov hlau oxide impurities.
Ntsiab lus:
| Ntiag tug | Zeb | Onyx / Calcite Alabaster |
|---|---|---|
| Rau pob tshab | Opaque | Translucent rau semi - pob tshab |
| Thin slab nyhuv | Yuavtranslucent(ci) yog ntshiab | Heevtranslucent(lub teeb hla dhau los ntawm kev kom meej) |
| Chav kawm | Metamorphic Pob Zeb | Sedimentary pob zeb (feem ntau) |
| Tus Cim Tseem Ceeb | Opaque nrog crystalline, interlocking grain | Waxy luster nrog parallel bands ntawm cov xim |
Hauv kev xaus:Thaum koj tsis tuaj yeem tau txais ib qho pob tshab ntawm marble, nws lub peev xwm yuav yog translucent yog cov khoom muaj txiaj ntsig zoo hauv kev tsim qauv thiab architecture. Rau cov pob tshab los yog ze {{{1} backbent pob zeb zoo saib, ib qho yuav sivonyxlossisCalcabasterHloov chaw.
