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 …
Lab-Grown Diamond Jewelry: What are Synthetic Diamonds? - GIA …
2016年12月13日 · Lab-Grown Diamonds: How are synthetic diamonds made? While natural diamonds formed millions to billions of years ago beneath the earth’s surface, synthetic diamonds are grown in a matter of days or weeks in modern-day labs.
Types of GIA Reports
Laboratory-grown diamond reports may be issued for diamonds that have been laser drilled. Colored Gemstone Identification. With a database of more than 100,000 individual colored gemstone samples, GIA’s expertise extends well beyond diamonds to colored gemstones.
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.
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.
What Are Simulated Diamonds? | Diamond Simulants | GIA - GIA 4Cs
2016年12月20日 · Simulated diamonds or diamond simulants are gemstones that resemble diamond’s appearance but have different properties than natural diamonds. Before you buy, learn their pros and cons here!
Diamond Clarity - GIA 4Cs
The clarity of a diamond is based on the size, location, visibility and number of inclusions or blemishes. Internal and surface reaching characteristics are called inclusions. External features are called blemishes. Precise clarity grading is the secret to accurately evaluating a diamond.
What are Triple X Diamonds? - GIA 4Cs
2023年8月22日 · Triple X diamond is a trade term for round brilliant diamonds that have been graded by GIA as having Excellent cut, Excellent symmetry and Excellent polish. X is short for Excellent, so Triple X really just means Triple Excellent.
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.
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. Learn more about our diamond reports.