Calacatta Extra by iStone

Calacatta Extra is an engineered quartz surface: crushed natural quartz bound with polymer resin and pigments. It is a manufactured material, not a natural stone. iStone does not publish a breakdown of its material here, so we cannot quote a percentage.

Our listing shows Calacatta Extra in a polished finish and 20 mm and 30 mm thicknesses. Our listing shows a polished finish and 20 mm and 30 mm thicknesses; iStone's website does not state them for this colour, so we confirm the finish and thickness in your quotation. Your quotation states the finish and thickness we have priced.

For everyday cleaning use a soft cloth with warm water and a little mild washing-up liquid, and wipe up spills promptly. Use a chopping board rather than cutting on the surface, a trivet or heat mat under hot pans, and avoid bleach, abrasive pads and harsh cleaners.

iStone care guidance · Quartz cleaning guide

Calacatta Extra costs £375–£550 per m², supplied, fabricated and installed. Your quotation is itemised and depends on your worktop and location.

How our prices work · Price calculator

RT Stone, which supplies iStone, describes a 15-year warranty that is conditional on installation by an iStone Certified Fabricator, registration within 30 days and the original invoice. Its website and warranty letter differ on scope, so we do not state a length until RT Stone confirms it. Stoneone's 2-year workmanship guarantee is separate, and we confirm the warranty that applies to your order in writing.

iStone warranty terms · Stoneone warranties