Marble is a Glittering Stone
By Frederick
M. Hueston, StoneForensics.com
Marble’s name speaks for itself (marmaros, Gr.
– glittering stone). During several thousand years it has preserved the right
to be considered a decoration material, shiny in every way. Artists noticed
that it is a unique material for sculpture as long ago as ancient times. The
Venus of Milo, Parthenon, Zeus of Olympus temple, columns of Artemis temple in
Ephesus, one of the Seven Wonders of the World, were created of soft white
marble.
Owing to moderate hardness, this stone is
polished perfectly well, and gives soft glitter coming from the inside. Under
the rays of light penetrating into the stone, marble comes to life – light shining
aureole appears around it. It glitters with pink, yellow, grey, blue, greenish,
reddish, brown, black tones and amazes with their various combinations. Colored
marble usually has many “stone veins”, which are splits filled with natural
admixtures. On the shears of Verona, Fossile Marrone, Jura, Rosso marble, an
attentive eye will distinguish shapes of ancient shellfish, corals, petrified
algae, shells. Some types of marble having quartz and pyrite admixtures glitter
with crystal and golden tinges.
Variety in texture and color (from deep black
to milkwhite, which, by the way, was worshipped by Michelangelo) allows to make
the brightest ideas come true. Subject to chosen colors, the “stone” interior
can be warm or cold, massive or airy, luxurious or simple, dark or light.
Marble processing.
Most of the stone working companies produce marble flag of standard size: 300 x
300, 305 x 305, 400 x 400, 600 x 300 mm. Thickness varies from 10-20mm and
more, subject to purpose. Considering tile texture, there are not too many ways
of marble surface treatment: polishing, grinding, bush-hammering, artificial
ageing.
Polishing and grinding emphasize the natural
beauty of the stone. Bush-hammering adds useful antiskid lines to the material.
“Antique” becomes more and more popular being preferred by lovers of the
antique in general and interior antique stylization. It is believed that the
natural ageing imitation (artificial weathering) creates a special atmosphere
of softness and warmness. Weathered marble is widely used for floor tiling in
modern restaurants and saloons: with its help the designers try to add an air
of authenticity to the interior. Artificially imitating this natural phenomenon
one can get different degrees of ageing. This effect is achieved through
special surface treatment technology, which may include mechanical (including
manual) and chemical influence. For example, for producing tabletops, wall and
floor decoration, stone mosaics is often used. It is put into a special barrel
where stones rub themselves against one another acquiring rounded shapes.
Marble application.
This decoration material is applied for inner and outer decoration. Floors,
walls, staircases, fireplaces, columns, tabletops, kitchen worktops, lamps,
decorated with marble always look wonderful.
Marble properties.
Marble is lasting, firm, weather-resistant. Nevertheless, with all its firmness
it remains a soft absorbing material. As is known, marble and shale are
carbonate sediments that are vulnerable to acid, coloring agents, thermal
impact. Marble surface should be protected from thermal impact – a cup of hot
tee or coffee may turn out fatal for a tabletop. It is possible to make stairs
or floor surface of marble, but one should prevent a possibility of dropping of
such abrasive particles as sand on a marble surface, as they will scratch the
stone.
Choosing a marble for wet premises one should
remember that a long-during contact with water changes marble’s color. The
reason of it is oxidation of ferruginous mineral admixtures. Nevertheless, this
material is more preferable for bathrooms than granite, as its structure is more
porous, which provides better binding.
It is important to make the right choice of
binder material for marble laying. Using cement grout or adhesive leads in some
period to appearance of irremovable spots on the marble surface – absorbed
saline and coloring additives. That is why it is recommended to apply special
adhesive solution and plaster. If you take into account these nuances and pay
attention to them in future, then not only you, but also your children and
grandchildren will be able to admire the stone beauty.
Marble treatment.
As to operations characteristics, marble is practically eternal. However, it
needs care and protection from aggressive environment – dust, water, salt, sand
and acid. Thereto special agents are used: reinforcers, polishes, stone
impregnations, cleaning solutions, mastic and even beeswax.
It concerns first of all polished floors. The
main enemy of the polished surface is dirt, that is why it is necessary to take
care of multistage protection system and regular surface cleaning. Wax
protection coating improves decorative appearance of the stone, protects it and
allows to wash the stone surface with water. For unprotected stone floors there
also exist special substances that clean the dirt and at the same time create a
protective film. Besides that, compositions reducing sliding even on the wet
stone surface have been developed.
If stone faults are so strong, that wax
preparations do not help anymore radical agents are applied – grinding with
subsequent polishing. Stone surface regrinding and repolishing is carried out
with the help of special equipment. Consequently the stone gains original
appearance.
Prices for marble.
The times, when only rich could afford decorating their houses with marble,
have gone. Technical producing and treatment methods have reduced the cost
price and the marble has turned from object of luxury to one of the available
goods.
The main suppliers of the “glittering stone”
are Italy, Greece, Turkey. China has recently become another active marble
supplier. The stone quality does not depend on the place of origin.
Environment, producing and treatment technology are much more important. On the
other hand, origin influences its price as it includes value of labor, custom
duties and transporting costs.
When buying marble facing slabs, it is
necessary to pay attention to size and quality of the surface. For slabs with
polished and grinded first-class surface finish visible faults are
unacceptable. The second class may have some defects: not more than two or
three small defects of the corners and chips on the edges. Colored first and
second class marble intended for inner decoration may have one non-through
crack of tectonic origin.
It is necessary to take into account the
existence of difficult for color selection marble and practically homogeneous
stones. Difference in slab color is a distinctive feature of natural material.
That is why the buyer should specify the level of possible color divergence
beforehand and check the maximum quantity of specimen.
Standard polished ten millimeter facing slab
costs from 8 to 40 pounds per m2. The main influential parameters are
originality, shape, color, firmness, type of treatment. Unique stone may excel
the base line in price considerably. An increase in slab thickness advances the
price greatly.
Marble is a noble material: right selection,
competent laying, follow-through experts’ recommendations will return a
hundredfold. Everyone dealing with marble will agree with Michelangelo’s words:
“Marble is a soul of the universe, the purest substance, created by god: it’s
not simply a god’s symbol, but reflection of his image, god’s means to reveal
himself. Only with the hands of god could this noble beauty have been created”.