Simulants, Moissanite and Lab-Grown Diamonds | GIA 4Cs
We created the GIA iD100 ®, a desktop instrument to help jewelers distinguish natural diamonds from laboratory-grown diamonds, diamond simulants and some treated diamonds in under two seconds. Laboratory-grown diamonds can also be sent to …
Types of GIA Reports
The GIA Diamond Grading Report. This report uses the universally accepted GIA standards to determine a natural diamond’s shape, color, clarity, cut and carat weight – as well as proportions, finish and treatments. It also includes a plotted diagram which maps your diamond, identifying its unique characteristics. The GIA Diamond Origin Report.
What Is a GIA Diamond - GIA 4Cs
2018年2月15日 · GIA diamond is a term you’ll find when engagement ring shopping – short for a diamond graded by GIA, the creator of the 4Cs and the independent, diamond authority. Learn more about GIA diamonds and why savvy shoppers rely on GIA.
Lab-Grown Diamond Jewelry: What are Synthetic Diamonds? - GIA …
2016年12月13日 · While natural diamonds were created deep in the bowels of the earth millions to billions of years ago, synthetic diamonds are created in laboratories in a matter of days or weeks through HPHT or CVD processes.
About GIA - GIA 4Cs
At the Gemological Institute of America, we’ve spent nearly 100 years ensuring that diamonds, colored stones and pearls are assessed, catalogued and graded on their quality, with unbiased scientific precision. Our International Diamond Grading System ™ is the global standard.
How to Buy A Diamond | GIA 4Cs
With a GIA Diamond Grading Report, you can confidently make your next diamond purchase. With an unbiased diamond evaluation, you’re free to focus on its beauty. We issue a variety of diamond reports, ranging from the GIA Diamond Dossier ® to the GIA Diamond Origin Report.
GIA Diamond Grading Scales: The Universal Measure of Quality
2013年3月14日 · 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. GIA created the 4Cs (Color, Clarity, Cut and Carat Weight) as a universal method for ...
About Synthetic Diamonds - GIA 4Cs
GIA tests every diamond to determine if it is natural. If a diamond is found to be laboratory-grown, GIA issues a Synthetic Diamond Grading Report, which looks distinctly different from the standard grading report.
Why the 4Cs? | GIA 4Cs
The 4Cs and GIA International Diamond Grading System ™ established scientific methods for diamond grading, creating a universal language for communication, and most importantly, ensuring diamond customers know exactly what they are purchasing.
Fact Checking Diamond Fluorescence: 11 Myths Dispelled - GIA 4Cs
2018年3月27日 · FACT: The majority of diamonds do not fluoresce. In a study of more than 26,000 diamonds submitted for grading to GIA, researchers found that only approximately 25% to 35% of them exhibited some degree of diamond fluorescence when examined with a standard long-wave UV lamp.