Earth Science question about metamorphic rocks?
marble іѕ a very well lονеd stone fοr artists tο υѕе whеn carving sculptures. Whаt properties οf marble mіght mаkе іt ехсеllеnt fοr sculpting?
Earth Science question about metamorphic rocks?
marble іѕ a very well lονеd stone fοr artists tο υѕе whеn carving sculptures. Whаt properties οf marble mіght mаkе іt ехсеllеnt fοr sculpting?
(just guessing) Maybe because the crystals are smaller so it makes the artist able to chip off the rock very accurately, instead of huge chunks falling off, distorting their sculptures.
It’s soft.
“Among the commonly available stones only marble has a slight surface translucency that is akin to that of human skin. It is this translucency that gives a marble sculpture a visual depth beyond its surface and this evokes a certain realism when used for figurative works. Marble also has the advantage that when first quarried it is relatively soft and simple to work, refine, and polish. As the finished marble ages it becomes harder and more durable. Preference to the cheaper and less translucent mineral is based largely on the fineness of marble’s grain, which enables the sculptor to render minute detail in a manner not always possible with mineral; it is also more weather resistant.”
A very low break point, and maleability in chiseling.
its strong and hard so it doesnt get scratched easily
Marble is chosen because it is softer than metal and it simpler to carve than other rocks like a granite or quartzite which are frequently harder than metal tools. Marble is primarily made of metamorphosed calcite and dolomite which both have a hardness on the Moh’s hardness scale of 3-4, most metal tools are a 5.5-6. Also, marble reacts with hydrochloric acid so acid can be useful to areas to make them weaker and simpler to remove.
The term marble is often used when the rock is not really a marble in counter tops or floors. Most “marble” counter tops and floors have foliation but many marbles are really not foliated, foliation is a product of regional metamorphism lining up mica minerals perpendicular to the highest amount of stress and most limestones (parent rock of marble) don’t have micas. Some people really have gneiss counters and floors. In construction, the term marble is used for an calcitic rock.