سنگ مرمر

سنگ مرمر (Marble) هڪ قسم جو پٿر آهي. هي پٿر ڪيلشیم ڪاربونيٽ، ڪاربن ۽ آڪسیجن جو مرڪب آهي. هي پٿر مجسمه تراشي ۽ جڳهن جي اڏاوت ۾ بيشمار استعمال ڪيو ويندو آهي.

Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite  (CaCO3) or dolomite (CaMg(CO3)2) that have recrystallized under the influence of heat and pressure. It has a crystalline texture, and is typically not foliated (layered), although there are exceptions. 

In geology, the term marble refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone.Kearey, Philip (2001). Dictionary of Geology, Penguin Group, London and New York, p. 163.  

Pure white marble arises from very clean limestone or rock also called dolomite. However, its signature veins and swirls result from impurities like clay, sand, iron oxides, or chert originally present in the protolith—magnesium-rich varieties may show green tones due to serpentine. These impurities are redistributed and recrystallized during metamorphism.  
Due  its  hardness,  durability and resistance to temperature, marble is often used in sculpture and construction. In sculpture marble is ideal for fine detail due to its uniform grain, moderate hardness, and ability to scatter light beneath the surface (subsurface scattering), lending the sculpture a lifelike, waxy appearance.Jensen, H. W., Marschner, S. R., Levoy, M., & Hanrahan, P. (2001). A practical model for subsurface light transport. Proceedings of the 28th Annual Conference on Computer Graphics and Interactive Techniques (SIGGRAPH '01), 511–518. ACM Press. https://doi.org/10.1145/383259.383319 In architecture marble is valued for its polishable surface, hardness, and wear resistance. In stonemasonry, "marble" may broadly include similar crystalline rocks, even if not true geological marble.El-Goddy, A., & El-Gendy, N. (2023). A prediction method for abrasion loss rate of some Egyptian carbonate rocks due to cyclic salt crystallization weathering using physico-mechanical deterioration: Insights from laboratory investigations. Acta Geodaetica et Geophysica. https://doi.org/10.1007/s40328-023-00401-2

The extraction of marble is performed by quarrying. Marble production is dominated by four countries: China, Italy, India and Spain, which account for almost half of world production of marble and decorative stone.


نالا  
ع. حجرالرخام، ف سنگ سفيد، هه. وغيره سپيد پٿر ۽ اسطوطليس
خاصيت
سڃاڻپ
هي مشهور پهڻ اڇي رنگ تي ٿيندو آهي.
طب
هن کي گلاب جي پاڻيءَ ۾ گـَـهي پيارڻ سان، ڦڦڙن مان يا واتان رت جو اچڻ، بواسير خونيءَ جو رت، حيض ۾ گهڻو رت بند ٿيندو. هن جو ٻورو نوشادر ۽ ميڻ سان ملائي مرهم ڪري ڦٽن، ناسورن، ڪوڙه ۽ چٽيءَ جي داغن تي لڳائبو ته انهن کي ڇٽائيندو. گهاٽي رت کي صفا ڪري ٿو ۽ کل جي بيمارين ۾ مفيد آهي.ڪتاب فرھنگ جعفري :؛ ليکڪ: حڪيم محمد جعفر؛ايڊيشن: 2007؛ پبلشر: سنڌي ادبي بورڊ ڄامشورو

حوالا

زمرو:پٿر
زمرو:معدنيات