An opaque calcite of a grass-green colour, occurring as large cleavage masses in central India and known as hislopite, owes its colour to enclosed "green-earth" (glauconite and celadonite).    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"] Reference

Greensand is a sand or sediment that consists of dark greenish grains of glauconite that is usually mixed with clay or sand.    From Wordnik.com.  [Southeast Farm Press RSS Feed] Reference

The magnesia and potash are, also, largely restored from the ocean; the former in dolomites and magnesian limestones; the latter in glauconite sands.    From Wordnik.com.  [The Birth-Time of the World and Other Scientific Essays] Reference

A series of worm-holes traced erratic hieroglyphics across a scaling corner; all the varied texts were illuminated by quartzose particles glittering in the sun, and here and there fine green grains of glauconite.    From Wordnik.com.  [The Riddle Of The Rocks 1895] Reference

Various potassium silicates -- leucite, feldspar, sericite, and glauconite -- and the potassium sulphate, alunite, have received attention and certain of them have been utilized to a small extent, but none of them are normally able to compete on the market.    From Wordnik.com.  [The Economic Aspect of Geology] Reference

Iron likewise combines with a considerable variety of substances other than oxygen; and some of these compounds, as for instance iron carbonate (siderite), iron silicate (chamosite, glauconite, etc.), and iron sulphide (pyrite), are locally mined as iron ores.    From Wordnik.com.  [The Economic Aspect of Geology] Reference