4Cs of Diamond Quality: Diamond Color Grading by GIA скачать в хорошем качестве

4Cs of Diamond Quality: Diamond Color Grading by GIA

http://gia.edu/diamond 4Cs of Diamond Quality: Diamond Color Grading by GIA. GIA created the 4Cs of diamond quality, the universal standard for assessing diamond value. Diamond color grading of most gem-quality colorless diamonds is based on the absence of color. A truly colorless diamond has no hue, and therefore a higher value. As the industry's most widely accepted diamond color grading system, GIA’s diamond D-to-Z color-grading system assesses the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions against masterstones of established color value. The scale begins with the letter D, representing colorless, and continues, with increasing presence of color, to the letter Z. Let GIA help guide you through the D-to-Z diamond color-grading scale with this one-minute video, which features tools like a diamond color chart and more. Learn more about diamonds with GIA’s gem encyclopeda: http://www.gia.edu/diamond • Diamond Quality Factors: http://www.gia.edu/diamond-quality-fa... • Diamond Description: http://www.gia.edu/diamond-description • Diamond Buyer’s Guide: http://www.gia.edu/diamond#buyers-guide • Diamond History and Lore: http://www.gia.edu/diamond-history-lore • Diamond Care and Cleaning Guide: http://www.gia.edu/diamond-care-cleaning • Color Grading “D-to-Z” Diamonds at the GIA Laboratory: http://www.gia.edu/gems-gemology/wint... Learn more about diamond and the mining of diamonds on the Official GIA Channel on YouTube • From Mine to Market, Part 1:    • Видео   • Diamonds – From Mine to Market, Part 2:    • Видео   • How to Choose a Diamond: GIA Diamond Grading Guide:    • How to Choose a Diamond: 10-Minute GI...   • How to Read a GIA Grading Report:    • How to Read a GIA Grading Report Vide...   • Diamond Cut, Clarity and Color:    • Diamond Cut, Clarity and Color by GIA   GIA exists to connect people to the understanding of gems. Our videos provide more information on diamonds, gems, and other related topics • Sapphire and Ruby Mine in Palin, Cambodia:    • River Mining in Pailin, Cambodia, by GIA   • Mining for Emerald in Brazil:    • Mining for Emeralds in Brazil by GIA   • What Attracts Us to Ruby | History:    • What Attracts Us to Ruby: History by GIA   SUBSCRIBE TO OUR CHANNEL    / officialgiachannel   FOLLOW US Facebook:   / gia4cs   Blog: http://4csblog.gia.edu/ Twitter:   / gianews   Pinterest:   / giapins   Google Plus: https://plus.google.com/1076590629596...