HPHT and CVD Diamond Growth Processes: Making Lab-Grown …
Jul 25, 2016 · Learn about the two main methods of producing synthetic diamonds in a laboratory: high-pressure, high-temperature (HPHT) and chemical vapor deposition (CVD). Find out how to identify lab-grown diamonds and their characteristics, such as …
Natural Diamonds | Diamond Stone – GIA C
Learn about diamond, the hardest and most precious gemstone, from its formation, history, quality factors, treatments, and more. Explore research, photos, videos, and buyer's guide from GIA, the world's foremost authority on diamonds.
What is Topaz Gemstone | Topaz Stone – GIA
Topaz is a gemstone with a wide color range, from blue to pink, and is the birthstone for November and December. Learn about its history, lore, treatments, and how to identify its quality factors, such as color, clarity, cut, and carat weight.
Programs & Courses - GIA
GIA offers various programs and courses in gemology, jewelry design and technology, and pearls at different campuses and online. Learn about diamonds, colored stones, pearls, CAD/CAM, and more with GIA's expert faculty and equipment.
Birthstones | Birthstone by Month - GIA
Learn about the birthstones for each month and their meanings, attributes and lore. Explore the history, origins and locations of these colorful gemstones and how to choose the perfect one for yourself or a loved one.
GIA - Report Check
GIA Report Check is a service that allows you to verify the accuracy and consistency of GIA reports for diamonds and other gems. You can access the report data, PDF, image, treatment description, and report access card for reports dated on or after January 1, 2000.
Natural Diamonds | Diamond Stone – GIA C
Learn how to choose a natural diamond based on color, clarity, cut and carat weight. Find a jeweler, verify a report, and get tips and advice from GIA, the world's foremost authority on diamonds.
Citrine Gemstone | Natural Citrine Stone - GIA
Citrine is a yellow-to-orange variety of quartz that is rare in nature and often heated from amethyst. Learn about its color, history, lore, treatments, synthetics, imitations, and quality factors from GIA, the world's foremost authority on gems.
Gemology Classes | Online Division - GIA
Learn gem and jewelry skills online with the flexibility and convenience of studying on your schedule. Earn an online credential with the same curriculum as on-campus students and get hands-on experience in lab classes.
What are the 4Cs? - GIA
Learn how to evaluate a diamond based on its color, clarity, cut and carat weight. GIA is a nonprofit organization that provides education, research and grading for gemstones and jewelry.