Marble

Written by Joey Lewitin


Marble Stone of Elegance Information and Facts

By Joey Lewitin

Marble is one ofrepparttar most sophisticated of stones. It is generally smooth and polished, although it can come in a rough texture. Its use historically is very widespread in both art and architecture.

Formation

Marble is a kind of limestone that has undergone a process which has maderepparttar 127631 structure ofrepparttar 127632 rock more solid. This process allowsrepparttar 127633 stone to take a high polish. This stone is generally formed when limestone is faced with extremes of pressure or temperature that cause it to undergo a process known as metamorphism. When Metamorphism occursrepparttar 127634 structure ofrepparttar 127635 limestone becomes crystal in nature, transforming into calcite or dolomite. These two substances arerepparttar 127636 main materials in marble. The crystal is a very strong molecular form andrepparttar 127637 result of this is a stronger, highly polish-able stone, with unique coloring characteristics often known as Marbling.

Coloring The many colors of marble are induced when impurities get caught inrepparttar 127638 structure ofrepparttar 127639 marble during formation. Impurities such as carbon, iron, and various oxides cause streaks and shapes to appear inrepparttar 127640 surface ofrepparttar 127641 stone. There are an enormous variety of impurities that can become trapped inrepparttar 127642 marble. The result is that marble comes in a very wide range of colors. Further,repparttar 127643 wayrepparttar 127644 impurities become trapped form randomized shapes inrepparttar 127645 marble which ensure that any piece ofrepparttar 127646 stone is one of a kind. It is this feature that inspired many artists to work with marble as a medium.

Limestone

Written by Joey Lewitin


Limestone

Limestone is one ofrepparttar most versatile stones available. In its pure form it is hard enough to be used in almost any application, however it is relatively soft compared to other building stones such as marble.

Limestone Variations

Forms of limestone include chalk (a much softer version), and marl (a type of fertilizer). Travertine is also a limestone, though harder. Travertine is often found in stalactite and stalagmites that have formed in caves.

Formation

Limestone is chiefly composed of calcium carbonate. It is a sedimentary rock, which means that it is formed byrepparttar 127630 collection of other minerals coming together to bond at a structural level. This most commonly occurs when lime builds up in oceans, then washes ashore and dries out.

Colors

It is white in its purest form; however impurities that become stuck inrepparttar 127631 structure during formation cause colorful streaks and shades to appear in its surface. There are literally an unlimited number of colors limestone can come in due torepparttar 127632 variety of impurities andrepparttar 127633 nature of their relationship torepparttar 127634 forming stone. Iron will generally causerepparttar 127635 colors in limestone to shift to red, or yellow, while carbon will shiftrepparttar 127636 colors more towards grey or black. The erratic nature ofrepparttar 127637 wayrepparttar 127638 impurities join withrepparttar 127639 limestone, means that each piece of limestone is unique. Despite these wide variations Limestone can be easily categorized into several subgroups.

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