Heat treated Sapphire in pressure environment

Heat treated Sapphire in pressure environment Lisa Greggio1, Muna Al Bulushi2, Maya Musa3 1 GIG Laboratory Director2 GIG Senior Gemology Analyst3 GIG Research Department Director Fig.1The 5.10 ct Oval mixed cut Sapphire analyzed by GIG Team. Recently, the GIG Laboratory team analyzed an oval mixed cut Natural Corundum, Sapphire variety, weighting 5.10 ct [Fig. 1]. […]

A Peculiar Gem

Libyan Desert Glass, A Peculiar Gem Lisa Greggio1, Muna Al Bulushi2, Maya Musa3 1 GIG Laboratory Director2 GIG Senior Gemology Analyst3 GIG Research Department Director Fig.1 The LDG analyzed, weighting 52.89 ct Last October a client submitted a pretty and rather big transparent faceted gem, fashioned in a mixed style and triangular shape, and exhibiting […]

New Methodology in Studying Amber Gemstones

Amber Identification: New Methodology in Studying Amber Gemstones A new methodology for the Amber characterization, combining the micro-ATR spectroscopy with ultraviolet (UV) fluorescence imaging, has been developed by GIG Research Department team in collaboration with GRS – GemResearch SwissLab, Peretti Museum Foundation and Foundation for Scientific Advancement (Arizona – USA). The IR spectra were analyzed […]

“Lonsdaleite Diamond”: What is All the Fuss About?

Lonsdaleite Diamond

“Lonsdaleite Diamond”: What Is All the Fuss About? Maya Musa1*, Lisa Greggio2 1 Research Department director, Gulf Institute of Gemology, Sultanate of Oman. *Corresponding author: maya.musa@gulfgemology.com2 Laboratory Director, Gulf Institute of Gemology, Sultanate of Oman Lonsdaleite is one of the most recent and rare materials researched by the scientists and it is characterized by amazing […]

Gulf Gemology MAG – 00 Special Issue

Gulf Gemology Mag, Special Issue Click on the cover to download the Gulf Gemology Magazine Special Issue Dear Reader,Welcome to our Gulf Gemology Mag Special Issue which is also the first issue, created as a celebration of the experiences collected during this first year of the Gulf Institute of Gemology. Indeed, it represents a miscellaneous […]

What is Diamond Grading?

What is Diamond Grading? GIG Diamond Grading Process Diamond Grading involves evaluating the qualities of an individual diamond and deciding how its qualities reflect its rarity and value. Diamond value is based on the famous 4Cs: Cut, Clarity, Color, and Carat Weight. The 4Cs are the four main characteristics that influence and illustrate the beauty of the […]

What Is Diamond Identification?

What is diamond identification? The early phase of diamond identification By diamond identification GIG answers to three main questions: Is it a real diamond or a simulant? Is a Natural one or a lab grown diamond? Is your diamond treated or untreated? The term “simulants” is used to indicate a material similar to the diamond […]

The Chiaravalle Cross: Results of a Multidisciplinary Study

The Chiaravalle Cross: Results of a Multidisciplinary Study Di Martino, D.; Benati, G.; Alberti, R.; Baroni, S.; Bertelli, C.; Blumer, F.; Caselli, L.; Cattaneo, R.; Cucini, C.; D’Amico, F.; Frizzi, T.; Gagetti, E.; Gironda, M.; Greggio, L.; Lazzarini, L.; Musa, M.; Perelli Cippo, E.; Riccardi, M.P.; Gorini, G. Abstract: The Chiaravalle Cross, a masterpiece of […]