4Cs 归档

Understanding the 4Cs of Diamond Quality

February 4, 2014

GIA created the 4Cs (Color, Clarity, Cut and Carat Weight) as a universal method for establishing how to check diamond quality anywhere in the world. The 4Cs means two very important things: diamond quality can be communicated in a universal language, and diamond-buying consumers can know exactly what they are about to purchase.

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Holiday Buying Guide – Part 4: Asking the Right Questions for a Diamond Purchase

November 27, 2013

For many, jewelry shopping can be an intimidating experience. Add crowded malls, a long list of gifts to purchase, and the desire to get ‘just the right thing,’ and it can be downright stressful. But knowing what to ask a jeweler can help make this a great shopping experience

In part 4 of our 2013 Holiday Buying Guide, GIA put together the top five questions to ask a jeweler when you’re shopping for jewelry this holiday season.

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4Cs Q&A with GIA: More on Diamonds

August 19, 2013

GIA’s 4Cs Q&A series wraps up with some bonus information on fluorescence, while passing along a few friendly words of advice. (more…)

Diamond Carat: A Measurement of Diamond Weight

March 28, 2013

When buying a diamond, it is important to understand what diamond carat weight is and how the weight of a diamond is measured.

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Diamond Cut: Crafting a Diamond’s Finish

March 25, 2013

A diamond’s cut and its shape are often confused, but we’re here to help! A diamond’s shape refers to its outline when viewed face up. A diamond’s cut refers to its facet arrangement. (more…)

Diamond Clarity: The absence of inclusions and blemishes

March 21, 2013

No diamonds are entirely without inclusions or blemishes, and these characteristics help gemologists accurately determine natural diamond clarity. (more…)

GIA Diamond Grading Scales: The Universal Measure of Quality

March 14, 2013

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. (more…)

Interactive Diamond Tool Now Available for Android

March 6, 2013

Owners of Android phones and tablets like the Kindle Fire and Samsung Galaxy can now benefit from GIA’s (Gemological Institute of America) free interactive diamond app for consumers and retailers, available in both English and Simplified Chinese. The app engages consumers with interactive features, video content and information on the GIA-created 4Cs (Color, Clarity, Cut and Carat Weight) of diamond quality. (more…)

Print GIA’s Diamond Buying Guide – 4Cs Guide to Understanding Diamond Quality

February 11, 2013

Here is a printable diamond buying guide designed to help anyone shopping for a diamond understand the 4Cs of Diamond Quality; Color, Clarity, Cut and carat weight. Print this handy guide and take it with you wherever you need to better understand the 4Cs of diamond quality.

We hope our diamond buying guide will help you navigate and understand the relative quality differences that exist on the color, clarity and cut grading scales. Print this guide and take it with you when you visit your jeweler.

Updated: GIA report scales have been updated with the newest scales as of December 2019.

Diamond Buying Guide – Part 2

February 7, 2013

Previously we outlined four basic steps to purchasing a diamond. Today we will expand on our explanation of the 4Cs – the four factors that determine a diamond’s value. (more…)

The GIA Diamond Buying Guide, Part One

February 6, 2013

Buying a diamond can be a significant purchase both emotionally and financially, but it doesn’t have to be intimidating. This GIA Diamond Buying Guide can help you determine what is the best quality diamond for you. Here are four basic steps to ensure that the journey to find your perfect diamond is as pleasurable as admiring the diamond you finally select.

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Diamond Carat Weight Grading

December 10, 2012

You can buy coffee by the pound. You can even buy deli meat by the pound. Even if you’ve never bought a diamond, the correlation between weight and price is a concept that we can all understand. Therefore, the general perception is that a larger diamond is more valuable than a smaller one. (more…)

GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

Understanding the 4Cs of Diamond Quality

Holiday Buying Guide – Part 4: Asking the Right Questions for a Diamond Purchase

4Cs Q&A with GIA: More on Diamonds

Diamond Carat: A Measurement of Diamond Weight

Diamond Cut: Crafting a Diamond’s Finish

Diamond Clarity: The absence of inclusions and blemishes

GIA Diamond Grading Scales: The Universal Measure of Quality

Interactive Diamond Tool Now Available for Android

Print GIA’s Diamond Buying Guide – 4Cs Guide to Understanding Diamond Quality

Diamond Buying Guide – Part 2

The GIA Diamond Buying Guide, Part One

Diamond Carat Weight Grading

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