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Examples
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Hornblende Ca2 (Mg, Fe, Al) 5 (Al, Si) 8O22 (OH) 2
Composition of rocks 2007
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Hornblende is common at Al-Madinah and throughout this part of
Personal Narrative of a Pilgrimage to Al-Madinah and Meccah 2003
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Hornblende and augite are two widely distributed minerals, which are so similar in composition and properties that they may be considered together.
Elements of Agricultural Chemistry Thomas Anderson
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Other important minerals are _Hornblende_ and _Augite_.
Manures and the principles of manuring Charles Morton Aikman
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Hornblende schists and beds of metamorphic limestone are rare.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various
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Hornblende schist is common over large areas in the Lake Superior region.
The Elements of Geology William Harmon Norton 1900
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Hornblende -- a black or dark green mineral, an iron-magnesian silicate, about as hard as feldspar -- is sometimes found as a fourth constituent, and the rock is then known as HORNBLENDIC GRANITE.
The Elements of Geology William Harmon Norton 1900
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