Various Defects of Natural Stone To be Aware of

  1. profile image55
    allystone7posted 10 years ago

    Shade variation - Slabs / tiles should be sorted to ensure uniformity of shade. Normally, any colour can be sorted into three shades. Sorting is simple -just lay all the material on the floor and look from different directions.

    If you will buy the entire quantity over a period of time,then you should make it a point to know from which specific quarry the material will be supplied as there will always be a difference between quarries.

    Grain variation - If grain varies between fine and coarse, such tiles / slabs should also be sorted uniformly by grain size. Sort this the same way as for shade. The further you see it from, the easier it is to sort.

    Oiling - Many black granites are light blacks.To make them temporarily look better (blacker), industrial oil is rubbed on it after polishing.This oil evaporates after some months leaving the slab looking very shabby. A burning match will heat an oiled surface and the oil will rub off on your finger.

    Colouring - Similarly, red oxide is put on red granites to make them look redder and to fill cracks. To check this, rub the surface hard with your finger and see if some red colour rubs off. By wetting the sawn surface(back side of polished piece), you can see the true colour and nature of any granite.

    Colour patches - These are darker or lighter patches or bands of single colours due to mineral localisation; in black this occurs as "oil patches"-patches which look as if oil has been spilled. These are actually permanent patches. Pay less for such materials.
    After laying and seeing from different angles, it is easy to see which pieces have these defects. Tapping with your finger nails or spoon may give different sounds on these patches compared to rest of the granite.

    Double colour - Sometimes two different grain sizes occur in the same slab, giving the appearance of a double colour. Pay less for such materials.

    Cracks - Test by pouring water, wiping and letting dry. Water which goes into a crack evaporates last.

    Staining - Many granites stain. Test before buying with wet spices or oil kept on it for a few minutes. Even if staining is not your worry, if you are going to wash the surface frequently, then check how long tap water remains absorbed. Some granites change colour when wet compared with when dry. Since drying is a slow process, the surface looks unattractive during the interim period when part of it is wet and part is dry.

    Holes - Some crystallic granites do not have a smooth surface. The surface chips or there are pin-holes. Avoid this type for horizontal applications.

    Having decided on a particular granite, it is important to note that shade and grain should be uniform in the entire lot and there should be no colour patches. Do not accept anyone saying that "this is not possible because granite is a natural material". If entire material is from one quarry, it is a simple matter.

    Accept defects only to put in hidden places.

    For more information, welcome to visit website at or LOL


This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

Show Details
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)