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Luigi Costantini

Dr. Luigi Costantini is a pioneer in Italy’s gemological landscape and a leader in the European gem and jewelry industry. He established IGI's School of Gemology in Italy in 1998 and was instrumental in its development and expansion throughout the country. He remains honorary president of IGI Italy.
clinohumite a.k.a. fire spinel
For Consumers For Professionals GemBlog IGI Classroom Opinion

Clinohumite by any other name…

July 22, 2021 by Luigi Costantini | 1 Comment on Clinohumite by any other name…

For Consumers For Professionals GemBlog IGI Classroom Opinion

Emeralds Under the African Sky

May 7, 2021 by Luigi Costantini | 1 Comment on Emeralds Under the African Sky

Behind the scenes For Consumers For Professionals GemBlog IGI Classroom News Opinion

The Spinel Murder Mystery of 2015

February 1, 2021 by Luigi Costantini | Leave a Comment

For Professionals GemBlog IGI Classroom Opinion

Phenomenal, prismatic, iridescent Ammolite

October 8, 2020 by Luigi Costantini | Leave a Comment

For Consumers For Professionals GemBlog IGI Classroom Opinion

Noblesse Oblige

August 1, 2020 by Luigi Costantini | 1 Comment on Noblesse Oblige

For Consumers For Professionals GemBlog IGI Classroom

Trapiche gemstones and Carmel Sapphire

July 9, 2020 by Luigi Costantini | 4 Comments on Trapiche gemstones and Carmel Sapphire

For Professionals GemBlog IGI Classroom

Monday mabe’ musings: Pearls of wisdom

June 15, 2020 by Luigi Costantini | 1 Comment on Monday mabe’ musings: Pearls of wisdom

For Consumers GemBlog IGI Classroom Opinion

The big pink disappointment

May 15, 2020 by Luigi Costantini | Leave a Comment

For Consumers For Professionals GemBlog IGI Classroom Opinion

Extraordinary and unusual stones

April 23, 2020 by Luigi Costantini | 5 Comments on Extraordinary and unusual stones

For Consumers For Professionals GemBlog IGI Classroom Opinion

Gambling with colored stones?

April 6, 2020 by Luigi Costantini | 1 Comment on Gambling with colored stones?

For Professionals GemBlog IGI Classroom Opinion

A little gossip about pearls

March 4, 2020 by Luigi Costantini | 4 Comments on A little gossip about pearls

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