skip to main content
  • 4Cs EDUCATION
    • 4Cs OF DIAMOND QUALITY
    • DIAMOND COLOR
    • WHAT IS DIAMOND CLARITY?
    • DIAMOND CUT
    • DIAMOND CARAT WEIGHT
  • DIAMOND BUYING GUIDE
    • HOW TO BUY A DIAMOND
    • SELECTING AN ENGAGEMENT RING
    • CARING FOR YOUR DIAMOND
    • INSURANCE AND APPRAISAL
    • WHERE DIAMONDS COME FROM
    • DIAMOND FLUORESCENCE
    • DIAMOND TREATMENTS
    • DIAMOND SIMULANTS
    • LABORATORY-GROWN DIAMONDS
  • GIA GRADING & REPORTS
    • GIA GRADING
    • WHY ASK FOR A GRADING REPORT?
    • HOW TO GET A GIA DIAMOND GRADING REPORT
    • GRADING THE 4Cs
    • DIAMOND GRADING REPORTS
    • DIAMOND ORIGIN REPORT
    • COLORED DIAMOND REPORTS
    • LGDR by GIA — Laboratory-Grown Diamond Reports
    • COLORED GEMSTONE AND PEARL REPORTS
  • ABOUT GIA
  • 4Cs BLOG
Diamond History
  • Diamond History , Diamonds in the News , Events , Gemstones

Queen’s Diamond Jubilee Sparkles with Many Types of Gems

June 13, 2012
Queen Elizabeth ascended the throne in February 1952, more than 60 years ago. When she was coronated a year later, …
  • Diamond History , Diamonds in the News , More on Diamonds

GIA on CBS Discusses a Rare Blue Diamond

June 06, 2012
Diamonds can be a symbol of wealth and power. While those purchased and worn by most consumers are more modest, …
  • Celebrating Birthstones , Diamond History

The April Birthstone Sparkles and Shimmers

April 01, 2012
Shimmering with an internal fire all its own, diamond is one of the world’s most sought-after and adored gemstones. …
  • Diamond History , GIA Grading & Reports

Unusual Petty Cash Draw in 1894

April 26, 2011
The effect of the lighting environment was well understood by jewelers in the late 1800s. Minimal grading standards at the …
  • Diamond History , Gemstone Simulants, Synthetics and Treatments , GIA Grading & Reports

What Are Synthetic Diamonds?

February 24, 2011
Synthetic diamonds are grown in a laboratory and have essentially the same chemical composition and crystal structure as natural diamonds …
Load More
GIA REPORT CHECK
Use your GIA report number to look up your report results.


ABOUT GIA

GIA Headquarters in Carlsbad

The World’s Foremost Authority in Gemology™

Established in 1931, GIA protects the public through gemological research, education, impartial gem identification and grading services, and instrument development.

RELATED RESOURCES
  • Retailer Lookup
  • GIA Report Check
  • GIA Gem Encyclopedia
  • GIA Laboratory Services
  • GIA Education
  • Are you a retailer?
  • GIA.edu
GENERAL INFORMATION
  • Terms of Use
  • Copyrights and Trademarks
  • Privacy Policy
  • Contact Us
  • English
  • 簡体中文
  • 日本語

    Use of this site signifies your agreement to its terms of use. © 2002 - Gemological Institute of America inc.

    GIA is a nonprofit 501(c)(3) organization. All rights reserved.