[DOC] [TLE] Ruby - Wikipedia [PAR] A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum 
(aluminium ... After color follows clarity: similar to diamonds, a clear stone will 
command a premium, ... The world's most expensive ruby is the Sunrise Ruby. ... 
Sapphire, ruby, and pure corundum are -alumina, the most stable form of Al2O3,
... [DOC] [TLE] 10 Gemstones Much Rarer Than Diamond - io9 - Gizmodo [PAR] Apr 16, 2012 ... In 2005, The Guinness Book of World Records called painite the world's ... "the 
recent discovery of the actual source of the original stones," and "the .... formed in 
a rare, clear-crystal form the largest faceted jeremejevite on Earth. ... As a result, 
some published estimates say rubies of similar quality (rubies... [DOC] [TLE] Gemstone Hardness and Wearability - International Gem Society [PAR] Diamond is the hardest material in the world but it's also brittle. Gemstone ... Thus
, a ruby can't scratch a sapphire and vice versa. ... A stone with a wearability 
grade of Poor, like an opal, means its jewelry use should be very carefully 
considered. ... However, rings also receive more abuse than any other form of 
jewelry. [DOC] [TLE] Ruby and Sapphire: Gems of the Mineral Corundum - Geology.com [PAR] Synthetic corundums offer consumers stones of great color and clarity at 
affordable prices. ... Ruby and sapphire have the same chemical composition 
and crystal structure .... Most gem-grade corundum forms in metamorphic rocks 
such as schist or ... highly sought after in many parts of the world for over one 
thousand years. [DOC] [TLE] 5 ruby is made of the mineral corundum, and is the hardest gem ... [PAR] 5 ruby is made of the mineral corundum, and is the hardest gem stone after 
diamond. corundum comes in a variety of hues, but is ... It has a hardness of 8 (
Mohs), forms crystals in a wide range of possible colors, and ..... Beautiful beyond 
words and smooth as butter, Rubies are the most popular gemstones all over the 
world. [DOC] [TLE] Corundum: The mineral Corundum, Sapphire, Ruby info & pictures [PAR] Translucent brown Corundum and Emery are the most common forms of 
Corundum. ... Some dark blue stones from certain localities may also be made a 
bright blue ... Ruby and Sapphire are the most famous gemstones after Diamond. 
... the centuries and are continuously and vigorously mined throughout the world. [DOC] [TLE] Ruby: The gemstone Ruby information and pictures [PAR] Transparent rubies of large sizes are even rarer than Diamonds. ... A unique 
gemstone form composed of opaque red Ruby in contrasting green ... Ruby is a 
tough and durable gem, and the only natural gemstone harder than Ruby is 
Diamond. ... as a secondary stone to complement other gemstones such as 
Diamonds. [DOC] [TLE] Top 10 Rarest Gems In The World | Game of Stones | Discovery [PAR] Check out the GAME OF STONES Top 10 Rarest Gems list from Discovery. ... 
worlds-rarest-gems-pink-star-diamonds-602x433 ... of years for crystals to form in 
nature, and only a fraction of those will ever be found, ... stone with rough edges, 
looks like glass but it is harder than glass and can ... I am after an arrangement 
for [DOC] [TLE] Diamonds vs. Other Gemstones: Which Should You Buy? [PAR] These two stones are the next hardest gems after diamond  they both have a ... 
choose the more durable sapphire or ruby, and get the best of both worlds. [DOC] [TLE] Rubies & SapphiresSparkling Reminders of God's Judgment ... [PAR] Jan 5, 2011 ... God's Word gives these two stones special attention. Indeed ... Corundum is the 
second hardest natural mineral, after diamonds. ... What took place inside the 
earth to form these gems and then transport them to the surface? [DOC] [TLE] Learn about Sapphire, Ruby, and Emerald at My Love Wedding Ring [PAR] Sapphires, Rubies, and Emeralds are the most desirable precious ... which is the 
crystalline form of aluminum oxide and when you think of sapphires, it

Question: Rubies are a form of this stone, the hardest in the world after diamond
Answer: corundum