gemstone-grading

Following the recent launch of IGI’s new science-based Light Performance Reports for round brilliant diamonds John Pollard, Senior Director of Education for IGI, and Garry Holloway, developer of the Ideal-Scope, will speak with Rapaport’s Leah Meirovich about what light performance is, how it can add value beyond the 4Cs, and why light performance reports can be helpful for selling diamonds.

Alright, buckle up because we’re about to take a road trip on the gemstone bus to the land of garnets! If you imagine gemstones had personalities garnets would be the rock stars crashing around the stage. Garnet is truly the ‘wild child’ of gems!

Amethyst, the birthstone of February, has a history steeped in legend and lore and has enchanted civilizations for centuries. With its striking purple hues, it has become not only a symbol of beauty but also holds deep symbolic meanings across various cultures.

A 7.50 carat IGI certified lab-grown diamond recently made headlines around the world, when it was gifted by Prime Minister Narendra Modi of India to Jill Biden, First Lady of the United States. Manufactured in Surat, Modi’s gift stands out for its exceptional quality, environmentally conscious production methods and national symbolism

Just days after certifying a record-setting 35 carat lab grown diamond, IGI has certified a 50.25 carat specimen measuring 22.95 x 18.45 x 11.57 millimeters – the first lab grown diamond to surpass the significant “half-century” mark in carat weight.

IGI has analyzed and graded a 35.00 carat laboratory grown diamond measuring 23.37 x 15.24 x 9.06 millimeters, the largest to date. Produced by Maitri Lab Grown Diamonds (Maitri), the new record holder was grown using the Chemical Vapor Deposition (CVD) process.

Take note of IGI’s daily schedule for the upcoming JCK show, where we will offer onsite diamond screening and grading, provide education at two “JCK Talks” sessions, conduct demos and host happy hours daily, and provide information to attendees at two separate booth locations.

Since the 15th century the diamond ring has been the celebrated symbol of faithfulness, love and commitment. Starting in 1975, […]

There are two sophisticated ways of producing lab-grown diamonds. One process assembles the diamond in vertical layers and the other uses a metal catalyst to dissolve carbon. These different approaches produce inclusions which differ from those seen in natural diamonds.

IGI has added a grade for cut to fancy shape diamond reports. In addition to traditional polish and symmetry analysis, the institute is now assessing the influence cut quality has on light behavior seen in shapes other than round.

IGI has partnered with Luxus, a new platform permitting people to invest in a “best in class” selection of precious gems, high jewelry and rare watches. The institute will serve as Luxus’ independent valuation partner, setting the value of pieces listed on the platform. 

IGI recently graded 27.27 carat, 20.24 carat and 15.16 carat lab grown diamonds produced by Greenlab Diamonds LLP as part of their “sustainable and affordable luxury” project. The 27.27 and 20.24 carat gemstones are the largest polished lab grown diamonds ever produced.

In the normal diamond color range ‘Z’ is classified as most tinted while ‘D’ is classified as most colorless. So what happened to A, B and C? Are they reserved for new diamond discoveries? Extraterrestrial diamonds? What could possibly be more colorless than most colorless? If there are 23 classifications why not start with ‘A’ and end with ‘W?’

The Guinness World Record for most diamonds set in one ring belongs to the IGI-graded Lotus Temple ring created by Mumbai’s Lakshikaa Jewels. Enjoy this wonderful video documenting the careful grading of each of its seven components.

“A diamond is forever,” but the makers of that slogan considered it a two-way street, connecting a diamond’s billion-year past with an infinite-future. They never imagined someone proposing with a “forever” diamond that’s younger than the bride.