Sandstone Red Grey

Sandstone

Sandstone is a clastic sedimentary rock composed mainly of sand-sized silicate grains, cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks.

Red

Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–750 nanometers. It is a primary color in the RGB color model and a secondary color in the CMYK color model, and is the complementary color of cyan. Reds range from the brilliant yellow-tinged scarlet and vermillion to bluish-red crimson, and vary in shade from the pale red pink to the dark red burgundy.

Grey

Grey or gray is an intermediate color between black and white. It is a neutral or achromatic color, meaning that it has no chroma. It is the color of a rain or storm cloud, of ash, and of lead.

sandstone

Noun

1. A sedimentary rock produced by the consolidation and compaction of sand, cemented with clay etc.

red

Noun

1. The color of the setting sun, blood, and strawberries; the color which is evoked by the longest visible wavelengths (between about 625–740 nm), and a primary additive color.
2. A revolutionary socialist or (most commonly) a Communist; a Bolshevik, a supporter of the Bolsheviks in the Russian Civil War.

Adjective

1. Of a red hue.
2. Having an orange-brown or orange-blond colour; ginger.

grey

Adjective

1. Commonwealth standard spelling of gray.
2. Synonym of coloured (pertaining to the mixed race of black and white).

Verb

1. Commonwealth standard spelling of gray.