Iolite is a transparent gemstone quality form of the mineral cordierite.
Light blue gemstone.
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Clarity grades have much less importance in blue gemstones than in colorless stones.
Since the color can mask inclusions it makes them less noticeable however avoid large inclusions or fractures as these can still make the stone more breakable.
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On the basis of dollars spent in the united states sapphire is the most popular blue stone and the third most popular colored stone after emerald and ruby.
Iolite is known to exhibit pronounced pleochroism often displaying violet blue yellow gray and light blue all in the same stone depending on the angle from which it is viewed.
It has a hardness of 7 to 7 5 on the mohs scale making quite suitable for jewelry wear.
For lighter toned blue gemstones a somewhat better clarity grade will improve the gem s appearance.
Topaz a translucent stone from very light blue to medium blue tourmaline the blue form of this stone is very rare turquoise this is a light to medium blue with green throughout zircon medium to dark translucent blue color with over 30 options you can definitely find the blue gemstone that is right for you.
While blue is the most well known sapphire color which can be found in a range of colors.
The finest of these blue crystals is known as the paraiba tourmaline which is among the most expensive of blue gemstones owing to its brilliant turquoise color.
Sapphire is the most popular blue gemstone and possibly the most highly sought after colored gemstone for engagement rings.
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Sapphire is a gem variety of the mineral corundum when corundum is reddish blue to violet blue it is known simply as sapphire corundums of any other color except red which is ruby are known as fancy sapphire.
Blue lace agate as it is known is usually banded in layers of light blue bright blue stripes and threads of brown.
Sapphire is made of corundum and becomes blue due to the presence of titanium and iron during its formation.
These blue gems come from the variety of tourmaline called indicolite from the word indigo though the gemstone may be a light blue not necessarily indigo.