Emerald
![Emerald crystal from [[Muzo]], [[Colombia]]](https://upload.wikimedia.org/wikipedia/commons/d/df/B%C3%A9ryl_var._%C3%A9meraude_sur_gangue_%28Muzo_Mine_Boyaca_-_Colombie%29_2.jpg)
Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds have many inclusions, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate.
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2
by Garner, Emerald
La Vergne : Haymarket Books, 2022
La Vergne : Haymarket Books, 2022
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3
by Emerald, John
New York : Beadle and Adams, 1874
New York : Beadle and Adams, 1874
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4
by Emerald, John
New York : Beadle and Adams, 1878
New York : Beadle and Adams, 1878
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5
by Emerald, John
New York : Beadle and Adams, 1876
New York : Beadle and Adams, 1876
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6
by Group, Emerald
Bingley : Emerald Publishing Limited, 2015
Bingley : Emerald Publishing Limited, 2015
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7
by Emerald, David
Chicago : Polaris Publishing, 2016
Chicago : Polaris Publishing, 2016
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8
by Group, Emerald
Bradford : Emerald Group Pub., 2004
Bradford : Emerald Group Pub., 2004
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9
by Group, Emerald
Bradford : Emerald Group Pub., 2005
Bradford : Emerald Group Pub., 2005
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10
by Emerald Group
Bradford : Emerald Group Publishing, 2003
Bradford : Emerald Group Publishing, 2003
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11
by Group, Emerald
Bingley : Emerald Publishing Limited, 2015
Bingley : Emerald Publishing Limited, 2015
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12
by Group, Emerald
Bradford : Emerald Group Pub., 2005
Bradford : Emerald Group Pub., 2005
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13
by Group, Emerald
Bradford : Emerald Group Pub., 2004
Bradford : Emerald Group Pub., 2004
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14
15
by Dechant, Emerald
[Hays, Kan.] : [News Publishing Co.], 1976
[Hays, Kan.] : [News Publishing Co.], 1976
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18
by Emerald, John
New York : Beadle and Adams, 1874
New York : Beadle and Adams, 1874
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19
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