grantham granite


stone image | specifications | finishes | applications | projects
Grantham Granite is an excellent choice for interior and exterior applications. Because of its superior properties and performance, and relatively consistent dark appearance, architects repeatedly specify this natural granite for interior flooring, exterior paving stone, stair treads, fireplace surrounds and stone wall cladding. Grantham Granite is available in honed, polished, cascade, flamed and waterjet finishes.

stone type



A dark, distinguished granite with a slight green tone. Contains subtle light and charcoal gray coloration and the occasional blue highlight. The material is relatively uniform in appearance.

weathering characteristic

Grantham will hold its basic color even after many years of exterior use.


Excellent material for interior and exterior applications. Hard and durable. No detrimental effects on the environment. Available in large sizes.


interior, exterior


Depending on the application, impregnating sealers may be required. Contact us for information regarding the use of sealers, impregnators, cleaning, etc.


upon request

ASTM results

upon request


stone image | specifications | finishes | applications | projects

Finishes Descriptions

Polished – a smooth, shiny surface.

Honed – a smooth, eggshell finish. Achieved with the use of fine diamonds.

Flamed – a textured finish that is relatively uniform, natural looking and slip-resistant.

Cascade - a fairly flat, uniform finish with subtle ripples and soft texture.

Waterjet – a fairly flat, textured appearance with an emery board feel.