[DOC] [TLE] Guide to Gemstones - Colors & Meanings | Wixon Jewelers [PAR] The value of the gemstone increases as the color change becomes more distinct. 
... Today, Citrine is known as the merchant's stone and is associated with success 
... These reasons make it a great gem for that big, bold, statement piece. ... This 
gem is available in a rainbow of colors, from the deep red Bohemian Garnet to... [DOC] [TLE] Ruby - International Colored Gemstone [PAR] And red is also the colour of the ruby, the king of the gemstones. ... For thousands 
of years, the ruby has been considered one of the most valuable gemstones on 
Earth. ... Only red corundum is entitled to be called ruby, all other colours being 
classified .... Rubies of Vietnamese origin generally display a slightly purplish 
hue. [DOC] [TLE] Ruby - Wikipedia [PAR] A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum 
(aluminium oxide). The red color is caused mainly by the presence of the element 
chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality 
corundum are called sapphires. ... The brightest and most valuable "red" called 
blood-red or "pigeon blood",... [DOC] [TLE] Ruby Quality Factors - GIA [PAR] These untreated and heat-treated rubies show a range of darker and brighter red 
colors. Color is the most significant factor affecting a ruby's value. The finest ruby 
has a pure, vibrant red to slightly purplish red color. ... Historically, the term 
pigeon's blood described the red to slightly purplish or pinkish red color of rubies
... [DOC] [TLE] Ruby Value, Price, and Jewelry Information - International Gem ... [PAR] Fine quality rubies are some of the most expensive gems, with record prices over 
... As a result, even these smaller stones are relatively high in value. ... in  to 1 
carat sizes with slightly purplish red color and light inclusions range from $300 to 
..... known as pigeon blood red, which is a very slightly purplish red with vivid... [DOC] [TLE] 10 Most Expensive Gemstones - Sather's Leading Jewelers [PAR] Mar 14, 2014 ... Here's a list of the ten most expensive gemstones. ... are only about 30 certified 
red diamonds in existence, and of these thirty, ... The most desireable ('pigeon-
blood' rubies) are worth around $15,000. This ruby is a deep purplish-red. ... Well
, this stone appears to change color  as some say, emerald by... [DOC] [TLE] Ruby: The gemstone Ruby information and pictures [PAR] Ruby is distinguished for its bright red color, being the most famed and fabled red 
gemstone. ... identified as a form of Sapphire (though some purplish-red colors 
may straddle the line of ... Such Ruby is known as "Burmese Ruby" or "Pigeon's 
Blood Ruby". ... Rubies must be have good transparency to possess gem value. [DOC] [TLE] Ace of Diamonds in Mount Pleasant, MI | Gem Guide [PAR] The ideal color change is fine emerald green to fine purplish red. ... The deep 
blue Hope diamond and blue Eugenie diamond, both in the Smithsonian .... color
. The brightest red rubies called pigeon blood red, are more valuable than other 
rubies of similar quality. .... These multi-colored gemstones are called "fancy 
jasper". [DOC] [TLE] Gemstone Information  Amazon Imports, Inc. [PAR] High quality Alexandrite is one of the most expensive of all gemstones. ... The 
most valued shades are deep, rich purple and deep purple with a reddish tinge. 
.... The most desirable color is the so called pigeon's blood, which is a pure red 
with a hint of ... Spinel also comes in beautiful blues, but these are extremely rare. [DOC] [TLE] What color is pigeon's blood. - RW Wise [PAR] Gems may have more than two hues but it it is difficult for even the most ... These 
are: pink, purple and orange. ... The finest color or pigeon's blood exhibits a 
purple secondary hue. ... It is known scientifically

Question: The most valued of these gems are a deep purplish red color known as "pigeon blood"
Answer: Rubies