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Stone Related Resources and Info

Detail on the types of marble available, and how each is best suited for different applications and areas.

There are numerous different types of marble ranging from the pure white Carrara which was used in ancient marble sculptures to Tennessee marble which has a pink hue to it. Due to the cost of marble, many people opt to use cheaper materials such as granite, Travertine, Sandstone or Slate which can be less expensive than purchasing bulk or even wholesale marble. Below if a list of the most common types of marble:

Carrara Marble – Pure white marble commonly used by the Greeks and Romans to design statues and fountains.

Faux Marbling – Refers to the painting of a surface intended to look like marble. It is commonly used in buildings where costs are trying to be avoided.

Paper Marbling – Another technique used to resemble true marble. Different color patterns are used together to give the material the look and feel of marble.

Limestone – Usually either beige or tan, this type of marble usually forms at the bottom of a lake.

Breccias – This type of marble is also called Breccia Oniciata or Breche Nouvelle and is caused by landslides or cave-ins. It is famous for its broken look.

Green Marble – These are actually not real marbles, but are instead serpentinites. Although visually similar they are not real marble.

Cultured Marble – This refers to when marble dust is combined with cement.

Marble-floored kitchen

Stone Identification

What is the difference between marble and granite?

Although both are stone and they're quarried from the earth, granite and marble (marble's relatives - limestone, onyx and travertine) are very different from each other. Granite is formed deep in the earth's mantle at extremely high temperatures, and is a very hard, resistant stone made of crystallized minerals. Marble on the other hand begins as sediment; animal skeletons, shells, plant matter, and silt at the bottom of bodies of water, and after millions of years this solidifies into stone.

Know Your Stone

Natural stone can be classified into two general categories according to its composition: siliceous stone or calcareous stone. Knowing the difference is critical when selecting cleaning products. Siliceous stone is composed mainly of silica or quartz-like particles. It tends to be very durable and relatively easy to clean with mild acidic cleaning solutions. Types of siliceous stone include granite, slate, sandstone, quartzite, brownstone and bluestone.

Calcareous stone is composed mainly of calcium carbonate. It is sensitive to acidic cleaning products and frequently requires different cleaning procedures than siliceous stone. Types of calcareous stone include marble, travertine, limestone and onyx. What may work on siliceous stone may not be suitable on calcareous surfaces.

How to Tell the Difference

A simple acid sensitivity test can be performed to determine whether a stone is calcareous or siliceous. You will need about 4 oz. of a 10%solution of muriatic acid and an eye-dropper. Or you can use household vinegar and an eyedropper. Because this test may permanently etch the stone, select an out of the way area(a corner or closet) and several inches away from the mortar joint. Apply a few drops of the acid solution to the stone surface on an area about the size of a quarter. If the stone is calcareous, the acid drops will begin to bubble or fizz vigorously. If little or no reaction occurs, the stone can be considered siliceous. Rinse the area thoroughly with clean water and wipe dry. This test may not be effective if surface sealers or liquid polishes have been applied. If an old sealer is present, chip a small piece of stone away and apply the acid solution to the fractured surface. CAUTION: Muriatic acid is corrosive and is considered to be a hazardous substance. Proper head and body protection is necessary when acid is used.

Stone Finishes

A polished finish on the stone has a glossy surface that reflects light and emphasizes the color and marking of the material. This type of finish is used on walls, furniture tops and other items, as well as floor tiles.

A honed finish is a satin smooth surface with relatively little light reflection. Generally, a honed finish is preferred for floors, stair treads, thresholds and other locations where heavy traffic will wear off the polished finish. A honed finish may also be used on furniture tops and other surfaces.

A flamed finish is a rough textured surface used frequently on granite floor tiles.

Stone Colors and Appearance

Granites and marbles are quarried throughout the world in a variety of colors with varying mineral compositions. In most cases, marbles and granites can be identified by visible particles at the surface of the stone. Marble will normally show "veins" or high concentrations. The minerals in granite will typically appear as small flecks distributed uniformly in the stone. Each type of stone is unique and will vary in color, texture and marking.

Sandstones vary widely in color due to different minerals and clays found in the stone. Sandstone is light gray to yellow or red. A dark reddish brown sandstone, also called brownstone, has commonly been used in the northeastern United States and eastern Canada. Bluestone is a dense, hard, fine-grained sandstone of greenish-gray or bluish-gray color and is quarried in the eastern United States.

Limestone is a widely used building stone with colors typically light gray, tan or buff. A distinguishing characteristic of many limestones is the presence of fossils that are frequently visible in the stone surface. Slate is dark green, black, gray, dark red or multi-colored. It is most commonly used as a flooring material and for roof tiles and is often distinguished by its distinct cleft texture.



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