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3528 Cottman Ave.

Philadelphia, PA 19149


The best cut for a sparkling diamond


Careful selection of the most beautiful diamonds

Each diamond is completely unique and there are countless ways to describe it. To streamline diamond descriptions, a system known as the "4 Cs" was created. The 4 Cs include color, clarity, cut, and carat weight. They are the universal diamond quality assessment method across the globe.


There are also additional criteria for diamond evaluation, so two diamonds that share the same 4 Cs criteria will often be very different. Infinity Jewelers chooses only the most beautiful diamonds, implementing a variety of standards in our selection process.

If you're looking for a diamond with an intense sparkle, cut is the factor with the most influence. Cut is expressed in terms of brilliance, fire, and scintillation.


To maximize sparkle, a diamond must be cut to very specific parameters of angle and dimension with strict attention to the polished finish of the diamond.

Clarity is a measure of a diamond’s purity. Naturally occurring features known as inclusions provide a special fingerprint within the diamond. These tiny features appeared while the diamonds were forming in the earth hundreds of millions or even billions of years ago and are invisible to the naked eye.


Clarity refers to how free a diamond is from these tiny blemishes and inclusions. Infinity diamonds are available from Flawless to SI2 (Slightly Included), providing any inclusions do not interfere with the beauty of the diamond, as determined by our experts.

Diamonds occur naturally in all colors of the rainbow. The rarest diamonds exhibit no color at all, apart from fancy colors.


Polished diamonds are graded for minute variations in depth of color, from ‘colorless’ to ‘light color’. This is universally known as the D to Z color scale (D meaning ‘exceptional’ and Z meaning ‘tinted color’). Many of these color distinctions are so subtle that they are invisible to the untrained eye; however, they strongly affect diamond quality and price.

Carat is a measure of a diamond's weight.  All else being equal, diamond price increases with diamond carat weight, because larger diamonds are rarer  and more desirable.


Two diamonds of equal carat weight can have very different values and prices, depending on the remaining 4 Cs. Although many people think that the number of carats is the only indication of quality, the other factors are just as important.

Rare large diamonds

Quality reflected in your diamond's color

Clear, blemish-free diamonds


Learn more about how to properly evaluate diamond quality by reading about the strict criteria we use to select our stones!

Find out more about our diamond selection.



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