Vermont Slate Colors

All Greenstone Slate comes from our 58 quarries and manufactured into roofing slates in our Poultney, Vermont facilities. Click on any thumbnail below to see fine detail . . .


Semi-Weathering Gray/Green
10% to 25% of the pieces will gradually show tones of buffs and tans. Brings a rustic, texture appearance.


Non-Weathering Purple
This slate can range from clear plum to deep magenta with green splashed. Used in a tone blend.


Vermont Clear Gray
Semi Weathering. Light to medium shades. Weathers 10% to 20% will show tones of buff shades.


Non-Weathering Wells Grey
Sometimes described as “the battleship color”, this slate exhibits soft, light grays accented with an occasional splash of black.


Non-Weathering Mottled Green and Purple
Unique to Vermont. Colors are a blend of soft shades of purple and green.


Vermont Gray/Black
Shows slate blends of gray and black. 4% to 6 % will exhibit slight signs of weathering after 12-18 months.


Non-Weathering Gray/Green
This is one of most popular. It is chosen to be used in a blend for multi-colored roofs.


Vermont Strata Gray
Gray background with various shades of darker gray and black. It will display some weathering over time.



Royal Purple
Rich purple in color, yet some pieces may exhibit small markings of green. These slates are a favorite where they are blended with other slates to create multi-colored roofs.


Also available…

Vermont Clear Black
An excellent hard-vein slate in shades of black, with an abundance of texture.

Variegated Purple
Primarily a purple tone slate, some having spots or streaks of green of varying size. However, in some slates, green will predominate with only tints of purple. A varying but small percentage will weather to shades of tan.

Non-Weathering Red
A hard-vein red slate, consistent in color, texture and strength. This color becomes more pleasing with age and is the rarest of the colored slates.

Del Carmen
A lustrous deep blue-black colored slate quarried in the Cabrera Mountains of North-West Spain. Learn more about our european slate colors.

A rich blue-gray colored slate with a rich texture quarried from the Rozadais geological formation within the Provence of Ourense in North-West Spain.Learn more about our european slate colors.

Important Color Information

A common misconception associated with the nomenclature of describing slate is the fact that frequently the terms weathering and fading are erroneously interchanged. Slates are classified as fading or unfading solely according to color permanence. Fading is characterized by a chalk-ashen residue that lessens the slates aesthetic beauty. The term unfading often refers to Blue-Black and Blue-Gray slates.

The term weathering refers to colored slates. While colored slates do not fade, some will experience some color change. The weathering of slate is induced by the oxidation of minerals as they are exposed to the elements. The weathering process slowly changes the color of the individual slate. Weathering slates will often exhibit changes that result in the color gradually turning to buff, brown, grays, or tan shades.

Colored slates can be classified as one of three types. The classification is based upon the extent to which the slates molt. The term weathering refers to slates that will exhibit the largest number of individual pieces that will transform from the original color to an earth tone. Slates deemed non-weathering would exhibit the least amount of color change. As the name would imply, semi-weathering slates are a combination of the two aforementioned types. Some of these slates will exhibit color change while others remain their original shade. The percentage of semi weathering slates that will experience color change is variable depending upon the location in the quarry from which the slate is extracted.

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Slate Widths Click here