Why is Slate different Colours?
The minerals inside slate is what determines its colour. In slates that appear green, this is due to chlorite – a group of common sheet silicate minerals that form during the early stages of metamorphism. They most often form in rock environments where minerals are altered by heat, pressure and chemical activity.Click to see full…
The minerals inside slate is what determines its colour. In slates that appear green, this is due to chlorite – a group of common sheet silicate minerals that form during the early stages of metamorphism. They most often form in rock environments where minerals are altered by heat, pressure and chemical activity.Click to see full answer. People also ask, does slate come in different colors? Color of Slate Most slates are gray in color and range in a continuum of shades from light to dark gray. Slate also occurs in shades of green, red, black, purple, and brown. The color of slate is often determined by the amount and type of iron and organic material that are present in the rock.Secondly, why is Slate expensive? Slate is expensive to produce, because much of the work is done by hand. Slate roofs are also expensive because shipping stone is not cheap. Another reason slate roofing is expensive is because the material is heavy to carry up to the roof. The lightest slate roofs weigh 650 to 800 pounds per square. Subsequently, one may also ask, what Colour is Slate? grey Where does black slate get its color from?Dark slates usually owe their colour to carbonaceous material or to finely divided iron sulfide. Reddish and purple varieties owe their colour to the presence of hematite (iron oxide), and green varieties owe theirs to the presence of much chlorite, a green micaceous clay mineral.
