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4 days ago · Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.
2 days ago · GIA's D-to-Z color-grading system measures the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions to masterstones of established color value. GIA's D-to-Z color-grading scale is the industry's most widely accepted grading system.
Nov 2, 2023 · The GIA Cut Grading System for the standard round brilliant diamond evaluates seven components. The first three, brightness, fire, and scintillation, consider the diamond's overall face-up appearance. The remaining four, weight ratio, durability, polish, and symmetry, assess a diamond's design and craftsmanship.
5 days ago · GIA gives you the knowledge and practical skills to translate your love for gems and jewelry into a rewarding career. Gemology. Immerse yourself in the beauty and science of gems and fine jewelry. Jewelry. Acquire the gem and jewelry knowledge to successfully serve customers in the exciting retail world. Design.
3 days ago · Learn how GIA was established and how the comprehensive research, state-of-the-art laboratory, and cutting edge educational programs have all contributed to GIA being recognized as the world's foremost authority on gemological knowledge.
2 days ago · GIA 4Cs Carat Weight. Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don’t confuse carat with karat, as in “18K gold,” which refers to gold purity.)
3 days ago · How to Choose a Diamond. $0.00. Play the informative 4- or 10-minute videos for your customers to help explain the 4Cs and how GIA grades diamonds. You may also want to share these videos with your sales staff to help educate them about GIA, the 4Cs and grading reports.
