Tanzanite: Unique Zoisite Colors by GIA

http://gia.edu/gem-encyclopedia

Tanzanite: Unique Zoisite Colors by GIA. What color is tanzanite? Typically, tanzanite, the December birthstone, is found in brown, blue, and violet colors. However, in recent years, a transparent, gem-quality green zoisite has been discovered in the Merelani Hills of mineral-rich Tanzania. The gemological properties are identical to those known for blue-violet or green tanzanite. In this video, Menahem Sevdermish discusses the many different tanzanite colors and hues and provides beautiful examples of both blue and green tanzanite gemstones. Also discussed is tanzanite’s most prized color, zoisite, which is a pure blue and similar to fine sapphire. Tanzanite is a pleochroic gem, which means it can show different colors when viewed in different crystal directions. This makes cutting a crucial element in determining the color the consumer sees when the stone is cut and set in jewelry. Understand the different quality factors that determine a tanzanite’s value, with color and cut leading the way.

Learn more about tanzanite and zoisite with GIA's gem encyclopedia: http://www.gia.edu/tanzanite
• Tanzanite Quality Factors: http://www.gia.edu/tanzanite-quality-factor
• Tanzanite Description: http://www.gia.edu/tanzanite-description
• Tanzanite Buyer’s Guide: http://www.gia.edu/tanzanite#buyers-guide
• Tanzanite History and Lore: http://www.gia.edu/tanzanite-history-lore
• Tanzanite Care and Cleaning Guide: http://www.gia.edu/tanzanite-care-cleaning

The Official GIA YouTube Channel is a great resource for tanzanite knowledge
• Tanzanite’s Pleochroism: http://www.youtube.com/watch?v=W9fjfGXr-m8
• Cutting Tanzanite: http://www.youtube.com/watch?v=JdnwSiJq7Gg

GIA exists to connect people to the understanding of gems. Our videos provide more information on diamonds, gems, and other related topics
• How to Choose a Diamond | GIA Diamond Grading Guide: http://www.youtube.com/watch?v=PafhSuJQb30
• How to Read a GIA Grading Report: http://www.youtube.com/watch?v=bZ2UtygPnt4
• Sapphire and Ruby Mine in Palin, Cambodia: http://www.youtube.com/watch?v=TKX-Zpg3nOo
• Mining for Emerald in Brazil: http://www.youtube.com/watch?v=rhWIK_yZ7XA
• What Attracts Us to Ruby | History: http://www.youtube.com/watch?v=D2ZmHEQNjUs

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Видео Tanzanite: Unique Zoisite Colors by GIA канала Official GIA Channel