1 Emeralds are the most precious of the beryl gemstones and related to aquamarine. 2  The word emerald is derived from the Greek word smaragdos and means green stone.. 3  Pure beryl is colorless. 4  The signature grass green color of an emerald is due to trace amounts of chromium and vanadium.
http://www.hsn.com/article/precious-gemstone-guide/156?nolnav=1
1 The gemstone is graded on color intensity, hue and tone. 2  The most valuable are intense and pure blue with a tinge of violet and very little gray or green hues. 3  Ceylon Blue, Cornflower Blue, Electric Blue, Kashmir Blue (from Kashmir), Royal Blue, Sky Blue, Velvet Blue and Violet Blue are sapphire colors.
http://www.hsn.com/article/precious-gemstone-guide/156?nolnav=1
Ruby Folklore. 1  Rubies have been deemed one of the most valuable gemstones throughout history. 2  The gemstones have represented passion and blood. 3  Its color has been described as a never-ending flame that creates passion and fire within.
http://www.hsn.com/article/precious-gemstone-guide/156?nolnav=1
The most expensive, a 4.2 carat gem sold in 2003 for $6.8 Million. 3. Serendibite USD $1.8-2 Million/Carat. This gem is a cyan colored stone that comes from Sri Lanka. It boasts an unusually complex formula consisting of calcium, magnesium, aluminum, silicon, boron and oxygen.
http://listverse.com/2007/12/02/top-10-rarest-gems/
--------------- CHECK OUT THE GEMSTONE 101 GUIDE --------------.
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The value of gemstones depends on the 4c's and depends on how rare that gemstone is. Like anything else the supply and demand also has a big impact in the price, if there is alot of that one gemstone, logically the price will be lower. If you dont know about the for 4c's please check my other guide.
http://www.ebay.com/gds/TOP-MOST-VALUABLE-COMMON-GEMSTONES-/10000000175018896/g.html
2. Red Diamonds USD $2-2.5 Million/Carat. Only a very few red diamonds are ever found, and few people have only seen even one treated red diamond. The gem is described as a purplish red, so it is not a pure red, crimson, vermilion, or scarlet. Nevertheless for its size it is one of the most expensive diamonds ever.
http://listverse.com/2007/12/02/top-10-rarest-gems/
Emerald Characteristics. 1  Emeralds are the most precious of the beryl gemstones and related to aquamarine. 2  The word emerald is derived from the Greek word smaragdos and means green stone.. 3  Pure beryl is colorless. 4  The signature grass green color of an emerald is due to trace amounts of chromium and vanadium.
http://www.hsn.com/article/precious-gemstone-guide/156?nolnav=1
As of early 2005, a clean, 2.93-carat faceted gem was selling on the Internet for $2000.00 per carat. 9. Black Opal USD $2,355/Carat. Australia is the classical Opal country and today is the worldwide most important supplier of Fine Opals. Almost 95 per cent of all Opals come from Australian mines.
http://listverse.com/2007/12/02/top-10-rarest-gems/
This gem was once believed to be the rarest mineral on earth, is today still considered very rare. British mineralogist 1950s first discovered it in Myanmar. When it was confirmed as a new mineral species, it was named after him: Arthur C.D. Pain.
http://listverse.com/2007/12/02/top-10-rarest-gems/
what is the most valuable gemstone
A ruby is the most valuable gemstone.