About us

RT Stone Supplier is a London based firm specialising in Importing Quartz, Granite, Marble, Tiles and other Natural Stone. RT Stone was established out of the desire of the owners to bring to the market high quality and affordable products. We have been established for over 6 years and are well known to the industry for our excellent customer service, we pride ourselves in undertaking high quality materials, skilled workmanship and competitive pricing. Unlike the vast majority of stone fabrication firms. Whilst we are happy to manage all aspects of an assignment, from start to finish, those clients with established designs, or who wish to use other providers for survey and architectural design services, can of course take advantage of our services independently. If you have an idea or design, we can make it a reality!
iStone quartz is the newest addition to the iStone portfolio. iStone quartz brings a natural aesthetic resembling some of our most asked for quartz materials. We are excited about the synergy of iStone Quartz and its complement to our product lines. iStone quartz surfaces are a blend of nature and technology. The perfectly engineered product for easy care, durability and colour consistency. iStone quartz surfaces contain up to 93% natural quartz, combined with resin, mineral pigments and other additives, giving it exceptional toughness and hardness. Being extremely resistant to scratching, scuffing and being very long lasting, iStone Quartz surfaces are an ideal solution for both residential and commercial applications.

Care Advices

RT Stone always believes in great supplying high quality products which last for years. As our slabs or tiles can be used anywhere from kitchen worktops, office flooring, bars & pubs to bathrooms. Below are the list of tips or maintenance guidelines that will help the end customer to maintain their Granite, Marble, Quartz and tile worktops and floors.

Our stone is high heat resistant but we always suggest using coasters for hot pans, any heavy or sharp objects so that they don’t damage the stone surface.

  • Always remember that any worktop or flooring can burn/stain if heat is applied directly. Make sure you take precautionary measures while using them.
  • The material is sometimes damaged by direct application of heat. Quartz stone is less heat resistant than other stone surfaces including most granite, marble and limestone; but is not affected by temperatures lower than 150 °C (300 °F). Quartz stone can be damaged by sudden temperature changes. Manufacturers recommend that hot pots and pans never be placed directly on the surface, and that a hot pad or trivet is used under portable cooking units.
  • When used as floor tiles, care is required in ensuring compatibility with the adhesive used. Reaction resin adhesives and rapid drying cementitious adhesives are generally successful, but bond failure can occur with other cementitious adhesives. Additionally, agglomerate stone tiles are more sensitive to both thermal expansion and contraction and to dampness from underlying screeds, necessitating the inclusion of movement joints at a higher frequency than for stone or ceramic floor tiles (see for example British Standard BS 5385-5: 2011) and verification by testing of the dryness of underlying layers.
  • Double check marble & granite cleaning products before buying, they should be suitable for usage on the natural stone and tiles. Some of them can cause discolouration which will be permanent.
  • Best way to clean our products is with a damp cloth and mild soapy water.
  • Always immediately clean any spillage to avoid discolouration due to harsh chemicals or ingredients.

With our own truck and reputable Hauliers, we can deliver to anywhere in the London and surrounding 60 miles radius within 1-2 days from time of orders, helping our customers meet their scheduled time.

For customers slab viewings are available on Saturdays also by appointment only and the timings are from 9:00am to 12:00 pm other than trading hours.

iStone quartz by RT Stone will warrant from the original date of installation material that fails due to any manufacturing defect when fabricated and installed by a iStone Certified Fabricator for a period of Fifteen (15) years. This warranty applies to the repair or replacement of failed material that has been permanently installed in a single-family residence. This Residential 15-year Warranty is available only to the original owner of a single family residence in which iStone fabricator has been originally installed. In the case of a newly constructed single-family residence, this warranty is available to the “first” owner purchasing the residence with iStone fabricator permanently installed and is transferable according to the terms and conditions stated below.

Terms and Conditions:

  • This warranty applies only to iStone quartz surfacing materials and does not apply to any other products, including other quartz surfacing products manufactured or supplied by any other party.
  • This warranty applies only to iStone quartz surfacing materials that have been permanently installed in the interior of single-family residences and have not been moved from their original installation. If after or during installation you decide that you do not like the colour or finish you selected, that decision is not covered under this warranty.This warranty does not cover any residence where the owner is not the occupant.
  • This warranty does not cover materials and/or services that have not been paid in full.This warranty applies only to materials that have been maintained according to the iStone Care & Maintenance guidelines. Care & Maintenance guidelines are available at www.istonequartz.co.uk & www.rtstone.co.uk .
  • To request service under this warranty you must contact the company who sold you or contact iStone directly at within thirty (30) days of the failure of iStone quartz surfacing materials.You must provide proof of purchase in the form of a copy of your original receipt or invoice showing the name of the Owner, Authorized Dealer and iStone Certified Fabricator. Upon receipt of your original receipt or invoice showing the name of the Owner, Authorized Dealer and Certified Fabricator, iStone will fully honour this warranty. You must agree to cooperate with iStone or its authorized agents in the inspection of the product and assist us in efforts to perform our obligations under this warranty.
  • In the event that iStone quartz surfacing materials fail due to a manufacturing defect. Its sole discretion, repair or replace such materials. iStone, will seek to obtain the best possible result, whether we decide to repair or replace your installation. However, exact colour match is never guaranteed. All decisions regarding this warranty are at the sole discretion of iStone No representative, dealer, salesperson, distributor, fabricator or any other person is authorized to make any warranty or promises on behalf of iStone with respect to iStone quartz surfacing products.


  • This warranty does not cover use for any commercial purposes. Commercial use includes but is not limited to, use in a store, rental properties, office or any other place of business.
  • This warranty does not cover products installed in any outdoor application.
  • This warranty does not cover products used as flooring material.
  • This warranty does not cover improper use or abuse. Improper use or abuse includes, but is not limited to, damage from mishandling of the product, damage from excessive heat or uneven exposure to weather conditions, physical or chemical abuse and damage from improper care and maintenance.
  • This warranty does not cover chips or other excessive impact damage in the product.
  • This warranty does not cover scratches. iStone quartz is a very hard material and highly scratch resistance but not scratch proof. Proper care must be exercised including the use of a cutting board as part of your care and maintenance.
  • This warranty does not cover routine maintenance. Routine maintenance includes but is not limited to, minor conditions such as removing stains and water spots by following the techniques specified in the iStone on-line Care & Maintenance Guidelines at www.istonequartz.co.uk & www.rtstone.co.uk.
  • This warranty does not cover failures due to fabricators/installers not following the prescribed fabrication and installation procedures as outlined by iStone,Improper fabrication and/or installation is the sole responsibility of the fabricator and/or installer.
  • This warranty does not cover any defects that were visible at the time of fabrication and were not avoided during fabrication. Fabricators are required to perform a visual inspection of all materials prior to fabrication and again prior to installation.
  • This warranty does not cover seam appearance or seam performance, adhesives, caulk or other accessory items. Once the product is installed, the two main reasons for seam separation or cracking are the shifting or movement of the substrate, cabinets or foundation, and thermal shock. Thermal shock can occur when a hot pan, dish or other receptacle or object is left on the countertop for more than a brief period. Trivets or hot pads should always be used. These issues are not considered material defects and are subject to proper care and maintenance by the owner.
  • This warranty does not cover any chemical damage.
  • This warranty does not cover any creative use of the material including bending or curving.
  • This warranty does not cover material that has been milled or reduced in thickness.
  • This warranty does not cover the installation of sinks.
  • This warranty does not cover securing mechanical fasteners directly into the material.
  • This warranty does not cover any failures due to inadequate support for the installation. This includes overhangs in excess of the recommendations provided by iStone which are inadequately supported.
  • This warranty does not cover any chips or cracks that are a result of “dry” cutting or polishing.
  • This warranty does not cover chips or cracks that are a result of not following the minimum requirements for edge details.
  • This warranty does not cover metered edges where the joint is not cut correctly.
  • This warranty does not cover the altering of any factory applied finish. Only colours listed as available in our brochure, sample book or on our website as “honed” are eligible under this warranty. Any issues arising from the practice of “in-shop” honing are the sole responsibility of the fabricator.
  • This warranty does not cover temporary marks that are common to honed finishes such as metal marks, fingerprints or other signs of daily living. A signed “Special Care Considerations for iStone Honed Finishes” form is required to be submitted to iStone or its assigns to receive coverage under this warranty. This form must be signed by the end user/owner of the finished installation.
  • This warranty does not cover additional modifications such as plumbing, electrical, tile, cabinets, flooring etc., that may be necessary to repair or replace the iStone product covered under this warranty.
  • This warranty does not cover natural variations in the colour, size, shape and distribution of the pattern of the natural quartz or the natural variations in background tone. These characteristics are inherent and unique characteristics of the product. Colour samples provided to consumers, dealers and fabricators are only representative and not an exact replication of what will be installed in your home.
  • This warranty does not cover what is referred to as spots or blemishes smaller that a U.S. ten (10) cent piece. A certain level of spots or blemishes are inherent in the manufacturing process and do not affect the structural integrity of the material.
  • iStone is not responsible for damage or injury caused in whole or in part by acts of God, job site conditions, and architectural/engineering design, and structural movement, acts of vandalism or accidents.
  • iStone shall not be responsible in either contract or tort for any loss of direct, indirect, consequential, incidental, special, exemplary, or punitive damages arising out of the use or the inability to use the products covered by this warranty. Some states do not allow exclusion or limitation of incidental damages, so the above limitations or exclusions may not apply to you.
  • The foregoing is the complete warranty iStone and supersedes all other warranties and representations, whether oral or written. except as expressly set forth above, no other warranties are made with respect to iStone expressly disclaims all warranties not stated herein, including, to the extent permitted by applicable law, any warranty that may exist under national, state, provincial or local law including but not limited to any implied warranty of merchantability or fitness for a particular purpose. some states or other jurisdictions do not allow the exclusion of implied warranties, so the above limitations may not apply to you.

0203 372 5489 info@rtstone.co.uk