[DOC] [TLE] Ruby and Sapphire: Gems of the Mineral Corundum - Geology.com [PAR] A very small amount of chromium gives corundum a pink color. Larger ... Most 
rubies in the market today have been heated to improve their color and clarity. ... 
Trace amounts of iron and titanium can develop a blue color in corundum. ... 
Sapphire crystal: A blue, doubly terminated, translucent sapphire crystal from Sri 
Lanka. [DOC] [TLE] What is corundum and what are its basic qualities? [PAR] The vivid colours of corundum gem varieties, such as ruby and sapphire, arise ... 
Thus, the finest rubies are those that have little to no iron in their crystal structure. 
... long and skinny minerals (almost always the mineral rutile, a titanium oxide, 
TiO2). .... The fancy sapphires (any colour of corundum other than blue or red) 
are... [DOC] [TLE] Sapphire - Wikipedia [PAR] Sapphire is a gemstone variety of the mineral corundum, an aluminium oxide 
Whilst typically associated with the color blue, natural "fancy" sapphires also 
occur in yellow, purple, orange, and green colors; "parti sapphires" show two or 
more colors. The only color which sapphire cannot be is red - as red colored 
corundum is ... Trace amounts of elements such as iron, titanium, chromium, 
copper,... [DOC] [TLE] CS08 Color.qxd - Gemological Institute of America - GIA [PAR] Most buyers prefer rich red hues (above) to dull pink ones (left) in tourmaline. ... 
The transmitted wavelengths give the gem its basic color, ... For example, a ruby 
might have some blue color zoning that gives ... In this selection of corundum, the 
basic colors, or hues, range from red through ..... transparent colored stones. [DOC] [TLE] Corundum Gemstone Family - Gemstone's Information [PAR] Complete information about Corundum Gemstone Family and two its famous ... 
For instance chromium gives the rich read of ruby. ... However sapphire is most 
closely associated with the blue color due to presence of iron and titanium. ... 
treated to dissolve the rutile to produce transparent rubies and sapphires of good 
color. [DOC] [TLE] What Makes Sapphires So Blue?  Green Lake Jewelry Works [PAR] Feb 7, 2014 ... Where diamonds are treasured for their lack of color, sapphires are most 
valuable ... the mineral variety corundum and gets its blue hue from the element 
titanium as ... oxide, corundum alone is actually a transparent mineral void of 
color. ... and pressure, you get the rich blue hue sapphire is renowned for. [DOC] [TLE] Sapphire Value, Price, and Jewelry Information - International Gem ... [PAR] The pure blue colors and excellent durability of this gem-quality member of the ... 
All red corundum gems are considered rubies. ... Sapphires get their 
extraordinary colors from traces of iron, titanium, ..... Transparency, Transparent 
to opaque .... Blue stones: give no reaction, except some blue Thai gems, which 
fluoresce... [DOC] [TLE] Optical Properties of Gemstones - Gemology Course [PAR] Transparent: A high proportion of the light is transmitted. .... Idiochromatic gems 
derive their color simply from the chemistry of their basic formula. ... Some 
examples of allochromatic gems are: beryl, corundum, quartz, grossular ... 
orange fancy sapphire, pair the iron with a bit of titanium, and the gem is the 
familiar blue, and if... [DOC] [TLE] Lattice-Diffused Sapphire | Titanium Diffusion - Ruby & Sapphire [PAR] Mar 7, 2013 ... Surface diffusion (lattice or bulk diffusion) treated blue sapphire and ... gem 
markets, particularly the important Bangkok corundum market. ... transparent and 
star corundums, particularly those of a blue color. .... had a lot of color of its own 
and just give it, via surface diffusion, a bit more ooomph for the dollar. [DOC] [TLE] Stones [PAR] No gemstone is more creatively colored and striped by nature than agate, 
chalcedony ... More recent studies suggest that the blue-green color results from 
small ... is green with distinctive red spots that resemble blood, giving this stone 
its name. ... fibrous matrix of the calcium, magnesium-iron rich amphibole mineral

Question: Iron & titanium give this corundum gem its rich translucent blue color
Answer: Sapphire