purple slate


stone image | specifications | finishes | applications | projects
Purple Slate, quarried in Vermont from our Vermont slate quarry that has been in operation for almost 150 years, is a rare stone used for interior and exterior applications. Because of its superior properties and performance, unique plum color and rich texture, architects specify this natural Vermont slate for interior slate flooring, exterior paving stone, stair treads, fireplace surrounds, slate wall cladding including slate wall shingles, countertops and roofing. Purple Slate is available in natural cleft, honed and cascade finishes.

stone type



A rich plum color containing occasional green markings.

weathering characteristic

“Semi-weathering”, meaning that some pieces change color when used outside and others do not. Those that do take on brownish tones. (Purple's weathering characteristic is an aesthetic consideration and does not adversely affect its performance or durability).


ASTM Grade A, relatively even cleft, exceptionally strong and hard, durable, dense, low absorption rate, and resistant to freeze-thaw cycles. Slip-, stain-, and heat-resistant. No detrimental effects on the environment.


interior, exterior


None required. Contact us for information regarding the use of sealers, impregnators, oiling, cleaning, etc.


upon request

ASTM results

upon request


stone image | specifications | finishes | applications | projects
Natural Cleft Finish
Natural Cleft Finish
Honed Finish
Honed Finish

Finishes Descriptions

Natural Cleft - a textured, natural finish, both visually and to the touch. Achieved by splitting the stone along its cleave with a hammer and chisel.

Honed - an extremely smooth, eggshell finish. Achieved with the use of fine diamonds.

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

Roofing - generally natural cleft both faces with trimmed edges. slate roofing finish