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Diamonds
AGS Diamond Grading System
What Are the 4Cs of Diamonds?
Understanding Diamond Cut
Understanding Diamond Color
Understanding Diamond Clarity
Understanding Diamond Carat Weight
History and Origin Story of April’s Birthstone: Diamond
The History of the Diamond as an Engagement Ring
Buying Diamonds
The Perfect Diamond Engagement Ring
The Perfect Proposal
Gems & Jewelry
Birthstones
January Birthstone: Garnet
February Birthstone: Amethyst
Amethyst Gemstone Overview
Amethyst Gemstone History
How to Buy Amethyst
March Birthstones: Aquamarine and Bloodstone
Aquamarine Overview
Bloodstone Gem Overview
The History of Bloodstone
How to Buy Bloodstone
April Birthstone: Diamond
May Birthstone: Emerald
June Birthstones
Pearls
Alexandrite
Moonstone
July Birthstone: Ruby
August Birthstones
Peridot
Sardonyx
Spinel
September Birthstone: Sapphire
October Birthstones
Opal Overview
Opal History
How to Buy Opal
Tourmaline Overview
Tourmaline History
How to Buy Tourmaline
November Birthstones: Topaz and Citrine
Topaz Overview
Topaz History
How to Buy Topaz Jewelry
Citrine Birthstone Overview
Citrine Gemstone History
How to Buy Citrine Jewelry
December Birthstones
Tanzanite Gemstone Overview
Tanzanite History
How to Buy Tanzanite
Zircon Birthstone Overview
History of Zircon Jewelry
How to Buy Zircon
Turquoise Stone Overview
History of Turquoise Gemstones
How to Buy Turquoise Stones
Birthstones in Folklore
Precious Metal Jewelry
Trending Now
Diamond and Jewelry Appraisals
Jewelry and Diamond Insurance
Moissanite
About Pearls
Guide to Buying Jewelry
Sell Your Fine Jewelry
Find a Jeweler
About AGS
American Gem Society Code of Ethics
Blog
Work with Us
AGS Laboratories
Contact Us
Jewelry Industry
Business Membership
Retail Business Membership
Partner Business Membership
Emerging Designer Membership
AGS Business Member Benefits Comparison
Strategic Partners
AGS Member-Get-a-Member Recruitment
Annual Report
Individual Membership
Credentialed Affiliate Membership
Non-Credentialed Affiliate Membership
Legacy Membership
Emeritus Status
Student Membership
Education & Events
Events
Conclave
Confluence
Events Calendar
Credentials
American Gem Society Credentials & Designations
Accredited Gem Laboratory
Calendar
Job Board
Testimonials
News
AGS News
AGS Community News
Diamonds
AGS Diamond Grading System
What Are the 4Cs of Diamonds?
Understanding Diamond Cut
Understanding Diamond Color
Understanding Diamond Clarity
Understanding Diamond Carat Weight
History and Origin Story of April’s Birthstone: Diamond
The History of the Diamond as an Engagement Ring
Buying Diamonds
The Perfect Diamond Engagement Ring
The Perfect Proposal
Gems & Jewelry
Birthstones
January Birthstone: Garnet
February Birthstone: Amethyst
Amethyst Gemstone Overview
Amethyst Gemstone History
How to Buy Amethyst
March Birthstones: Aquamarine and Bloodstone
Aquamarine Overview
Bloodstone Gem Overview
The History of Bloodstone
How to Buy Bloodstone
April Birthstone: Diamond
May Birthstone: Emerald
June Birthstones
Pearls
Alexandrite
Moonstone
July Birthstone: Ruby
August Birthstones
Peridot
Sardonyx
Spinel
September Birthstone: Sapphire
October Birthstones
Opal Overview
Opal History
How to Buy Opal
Tourmaline Overview
Tourmaline History
How to Buy Tourmaline
November Birthstones: Topaz and Citrine
Topaz Overview
Topaz History
How to Buy Topaz Jewelry
Citrine Birthstone Overview
Citrine Gemstone History
How to Buy Citrine Jewelry
December Birthstones
Tanzanite Gemstone Overview
Tanzanite History
How to Buy Tanzanite
Zircon Birthstone Overview
History of Zircon Jewelry
How to Buy Zircon
Turquoise Stone Overview
History of Turquoise Gemstones
How to Buy Turquoise Stones
Birthstones in Folklore
Precious Metal Jewelry
Trending Now
Diamond and Jewelry Appraisals
Jewelry and Diamond Insurance
Moissanite
About Pearls
Guide to Buying Jewelry
Sell Your Fine Jewelry
Find a Jeweler
About AGS
American Gem Society Code of Ethics
Blog
Work with Us
AGS Laboratories
Contact Us
Jewelry Industry
Business Membership
Retail Business Membership
Partner Business Membership
Emerging Designer Membership
AGS Business Member Benefits Comparison
Strategic Partners
AGS Member-Get-a-Member Recruitment
Annual Report
Individual Membership
Credentialed Affiliate Membership
Non-Credentialed Affiliate Membership
Legacy Membership
Emeritus Status
Student Membership
Education & Events
Events
Conclave
Confluence
Events Calendar
Credentials
American Gem Society Credentials & Designations
Accredited Gem Laboratory
Calendar
Job Board
Testimonials
News
AGS News
AGS Community News
Emerald
NuStar Diamonds
October 25, 2025
Read More »
Landau Diamonds
October 25, 2025
Read More »
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