A Flawless diamond is called Flawless on the clarity scale. The diamond is also graded according to its colour, its carat weight and its cut.
Unless the stone is larger than about 10 carats, it might not have a name. However, if it is a strikingly unusual colour, a smaller stone might be named.
You can read more about named diamonds, below.
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You can review the images, below, to see photos of flawless diamonds. Clearly, they appear 'flawless'.
Your diamond may be a black diamond, if it's a diamond. There is a black diamond scale which ranks stones with AAA grades. Diamonds that are flawless are labeled IF for internally flawless, or FL for flawless. This stone could also be something other than a diamond. Only a gemologist can give you the value, based on its cut and determination of how the stone achieved its colour.
The highest clarity grade is F - Flawless, or IF - Internally Flawless.
A flawless stone of this size is extremely rare. Take your diamond to a certified gemologist, who will certify that the diamond is indeed flawless, and who will help you describe the stone otherwise: its colour and cut will also affect its price.
Pure is variable and can be used to define the flawless nature of a diamond.
Diamond transparency -- also known as clarity -- varies from none to flawless, depending on the quality of the diamond.
The name for a large flawless diamond of 99 carats or more is a Paragon.In olden days, this name was given to flawless diamonds that were at least 12 carats, however the standard was raised over time.
You can buy a 6.01 carat Flawless diamond today on Blue Nile, with an F colour and pay just over US$423,000.
Today, on Blue Nile, you can buy a diamond -- internally flawless, not flawless (may be able to cut to flawless) -- of this approximate weight, and pay between US$456,181 and US$479,192, depending on the cut and exact carat weight that you want. A flawless diamond of this carat weight may become available at an auction house, where you could purchase it for the auction price. Without endorsement from Andwers, you can watch for such an auction, below.
The highest rating given to a top quality diamond is D-Flawless.
FL on a diamond ring probably means the diamond or diamonds are flawless.