Difference between revisions of "Emerald"

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The '''emerald''' is a variety of the mineral [[beryl]], colored green by trace amounts of chromium and sometimes iron.  It is highly prized as a [[gemstones|gemstone]] and ounce for ounce is the most valuable gemstone in the world, often made more so by inclusions.
 
The '''emerald''' is a variety of the mineral [[beryl]], colored green by trace amounts of chromium and sometimes iron.  It is highly prized as a [[gemstones|gemstone]] and ounce for ounce is the most valuable gemstone in the world, often made more so by inclusions.
  
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In [[ancient]] times and throughout the early Middle Ages, the term '''emerald''' could mean any green gemstone. Pliny the Elder mentions 12 varieties of emerald; amond them are:
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*malachite (the original "true" emerald)
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*prase (a leak-green variety of quartz; since modern times it has also been known as ''aventurine quartz'')
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*chrysoprase (a type of ''chalcedony'', the color ranges from pale to apple green)
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*jasper (the term ''iaspis'' originally referred to several spotted green stones, which may have included serpentine and nephrite ''jade'')
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== References: ==
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*Walter Schumann, ''Gemstones of the World'', New York, (rev) 1997
 
''See also:''
 
''See also:''
 
*[[Emerald (maplet)|Emerald according to Maplet's ''A Greene Forest'']]
 
*[[Emerald (maplet)|Emerald according to Maplet's ''A Greene Forest'']]

Revision as of 08:00, 5 May 2006