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Stone Types

Stone Types

Granites are a popular choice of stone type used in benchtop applications today.

It is a light-coloured, plutonic rock commonly found in mountainous areas. The chemical composition of granite is typically silica, alumina, potassium oxide, soda, lime, iron, magnesia and titania.

There are several varieties of stone that are commercially sold as granite due to similar working and performance qualities (e.g. gabbro, anorthosite, gneiss, diabase and diorite).

Abrasion Resistance
Granites are some of the hardest of the common dimension stones, offering high levels of resistance to abrasion and scratching.

Chemical Resistance
The primary minerals found in granite materials are virtually resistant to all chemicals found in a residential setting, however there may be trace minerals present in granites and granite like stones that are vulnerable to some acids.

Stain Resistance
Granites and granite like stone have very low absorption rates and therefore are less susceptible to permanent staining compared to other materials.

Marble, serpentines and onyxes are traditionally prized for their aesthetic appeal, accentuated by pronounced veining trends and often bold colours.

Marble is a calcium carbonate-based, metamorphic stone formed by the re-crystallization of limestone under intense geological pressure and heat.

There are two types of marble, calcite and dolomite. The existence of these two substances in minor amounts during rock formation cause the veining, clouds and mottled shading found in marble. This textured effect can vary from very fine uniform grains to large random crystals of calcite.

The marble colour is determined by the mineral composition and can vary from brilliant white through to black, and include shades of blue-grey, red, yellow and green.

Abrasion Resistance
Marble is susceptible to abrasion attack, which occurs most commonly from common kitchen utensils, and can be prevented with judicious use of protective cutting boards and similar measures. The use of cleaners containing abrasives must be avoided.

Chemical Resistance
Chemical attack is most commonly brought about by exposure to acidic solutions, such as lemon juice, juice of tomatoes, vinegar etc. The use of inappropriate cleaning agents can cause acidic attack.

The application of a sealer may reduce the vulnerability to acidic attack, but will not eliminate it completely. Honed marble is less porous than polished marble.

Limestone rocks are sedimentary rocks made from mineral calcite, which is found in the beds of evaporated seas and lakes.

Limestone is calcareous rock made up of carbonate in the form of calcite, aragonite, or dolomite. A large proportion of limestone is biogenic (containing fossil material).

Another well known building limestone is travertine, a chemically deposited limestone that is less chalky and provides more colour and strength.

Limestone can be polished, honed, sand blasted or brush hammered and comes in a broad range of natural hues, grey/buff, cream/tan and bone/white.

Abrasion Resistance
Limestone and travertine are susceptible to abrasion attack, particularly with provided with a polished finish. Abrasion damage occurs most commonly from common kitchen utensils and can be prevented with judicious use of protective cutting boards and similar measures. The use of cleaners containing abrasives must be avoided.

Chemical Resistance
Chemical attack is most commonly brought about by exposure to acidic solutions, such as lemon juice, juice of tomatoes, vinegar, etc. The use of inappropriate cleaning agents can cause acidic attack.

Stain Resistance
Limestone and travertine like stone have high absorption rates, and commonly, a sealer can be applied to help retard the rate of water absorption into the stone.

Reconstituted stone is typically composed using around 90-95% quartz granules but can also be made from a combination of granite, marble dust and glass chips mixed in with a polymer resin and pigments.

Reconstituted stone is a wonderful product for household applications like kitchen benchtops and splashbacks. There has been a significant increase in colour choice in recent years and reconstituted stone products can look remarkably like natural stone options including granites and veined marble products.

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Geelong
17-21 Riversdale Road
Newtown VIC 3220
1300 241 305
sales@theedgeglass.com.au

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66-70 Export Drive
Brooklyn VIC 3012
1300 241 305
sales@theedgeglass.com.au

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