GIA Diamond Grading Scales: The Universal Measure of Quality

The prospect of purchasing a diamond may seem daunting, but through GIA, an unbiased authority on diamonds, you have several handy resources to help you select the highest quality diamond. First up, an overview of the 4Cs: Color, Clarity, Cut, and Carat Weight.

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Download GIA’s 4Cs Guide to Understanding Diamond Quality

Here is a simple reference guide designed to help anyone shopping for a diamond understand the 4Cs of Diamond Quality; color, clarity, cut and carat weight.

This guide will help you navigate and understand the relative quality differences that exist on the color, clarity and cut grading scales.

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Are Diamonds Really Perfect?

It has been said that few things in nature are absolutely perfect. The same holds true of diamonds. Part of what makes a diamond unique is what is commonly referred to as a diamond’s clarity characteristic.

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Introduction to Diamond Clarity: Understanding a Diamond Clarity Grade

Few things in nature are absolutely perfect. This is also true with diamonds. As touched on in the first part of the clarity series, diamonds have internal features called inclusions and surface irregularities called blemishes.  Together, inclusions and blemishes make up a diamond’s clarity characteristic.

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Introduction to Diamond Clarity: What are Inclusions and Blemishes

Diamond clarity is one of the four quality factors (the 4Cs) that describe and determine the value of a diamond. By definition, clarity means “a gemstone’s relative freedom from inclusions and blemishes.” These two terms are locational- blemishes are found on the outside of the gem and inclusions are located on the inside. Both of these clarity characteristics can dim the brilliance of a diamond, though some are so minute that they are invisible to the naked eye.

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