IGI Certified Diamonds

The International Gemological Institute (IGI), established in 1975 in Antwerp and New York, is one of the world's leading gemological institutions. Thanks to the IGI's reputation for integrity, accuracy, and reliability, hundreds of thousands of diamonds pass through this laboratory's halls each year. In 1982, the IGI answered the growing demand for education, when it became the world's first gemological institute to offer courses in rough and polished diamonds. IGI has bases of operations in eight vital industry locations throughout the world.

Since 1975, IGI reports have proven to be the internationally recognized passport for gemstones and fine jewelry. At IGI over 450 scientific technicians and gemologists examine hundreds of thousands of colored stones and jewelry items every year. IGI has established bases of operations in eight vital industry locations throughout the world. Five cities have achieved preeminence in the international diamond and gemstone market: Antwerp, New York, Bangkok, Mumbai and Tokyo.

Methodology

Each diamond graded by the IGI is scientifically analyzed by several graduate gemologists. These experts team their knowledge and experience with state-of-the-art equipment to prepare an accurate description of each diamond. All gemologists must agree on each diamond before a grading report can be issued.

• Weight is determined using an electronic balance that measures to ten-thousandth of a carat.
• Measurements are taken, and every angle and facet is measured to evaluate polish and symmetry.
• Clarity is graded by determining the number, nature, size, and position of any internal characteristics. This analysis is performed by means of a high-powered microscope and a 10x magnification loupe.
• Color is described by comparing the diamond to a set of master stones of predetermined hue.

View an example of the IGI Grading Report.

Cut Grade

Diamonds that receive the IGI's ideal cut designation are striking in their precision and thus bear clear witness to the cutter's skill. Diamonds that meet the IGI's rigorous criteria typically retain little of their rough weight, require considerable time to make, and display abundant brilliance.

Brilliance Fun Fact: IGI's state-of-the-art laboratories are located in the heart of the gem and jewelry districts throughout the world including New York, Los Angeles, Toronto, Antwerp, Bombay, Bangkok, Tokyo and are represented in Israel, Italy, Korea, and Dubai.

Brilliance Experience - Shopping IGI Certified Diamonds

Brilliance offers expert guidance to help you select the perfect IGI certified diamond. View the exquisite IGI Certified Collection from the list below. Or click on Personal Shopper™ for one-on-one guidance from a certified Diamond expert.

The International Gemological Institute (IGI)

IGI - New York
589 Fifth Avenue
New York, New York 10017
www.igiworldwide.com