glau·co·nite /ˈglɔkəˌnaɪt/
海綠石
Glau·co·nite n. Min. The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See Greensand.
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glauconite
n : a green mineral consisting of hydrated silicate of potassium
or iron or magnesium or aluminum; found in greensand