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4Cs Education
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Simulants, Moissanite and Lab-Grown Diamonds
GIA Grading & Reports
Grading the 4Cs
GIA Diamond Grading
Types of GIA Reports
About GIA
4Cs Blog
4Cs Education
Why the 4Cs?
Diamond Color
Diamond Clarity
Diamond Cut
Diamond Carat Weight
Diamond Buying Guide
How to Buy A Diamond
Diamond Treatments
Diamond Origin
Simulants, Moissanite and Lab-Grown Diamonds
GIA Grading & Reports
Grading the 4Cs
GIA Diamond Grading
Types of GIA Reports
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Diamond Buying Guides
Oval Cut Diamond Guide
September 23, 2025
Oval cut diamonds are a popular choice for engagement rings. Learn the key factors to look for when shopping for an oval diamond ring.
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Tennis Bracelet Buying Guide: Diamonds & Gemstones
September 12, 2025
Learn the history of the tennis bracelet and explore key design elements—from stone shape and setting to metal type and proper fit.
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Settings That Make Your Diamond Engagement Ring Look Bigger
July 16, 2025
Engagement ring settings define your style, and add drama and protection to the stone. The right setting and band can also make your diamond look bigger.
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