Agate

Agate

Agate ( /ˈæɡət/) is a microcrystalline variety of silica, chiefly chalcedony, characterised by its fineness of grain and brightness of color. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks.

Read more about Agate.

Famous quotes containing the word agate:

    “Shaw’s plays are the price we pay for Shaw’s prefaces.”
    —James Agate (1877–1947)

    “O heart, small urn
    of porphyry, agate or cornelian,
    how imperceptibly the grain fell
    between a heart-beat of pleasure
    and a heart-beat of pain.”
    —Hilda Doolittle (1886–1961)

    “I see the horses and the sad streets
    Of my childhood in an agate eye
    Roving, under the clean sheets,
    Over a black hole in the sky.”
    —Allen Tate (1899–1979)