Daphné Giacomazzi (1), Marianne Dragon (1), Marie-Hélène Corbin(1) Abstract Canada is a country rich in its diversity of minerals, some of which have gem varieties. Yet only three gemstones are of both local and international economic importance: the diamond, the nephrite jade and the ammolite. Other gems, such as hessonite garnet, are not abundant enough […]
Marie-Laure Cassius-Duranton (1) Abstract Among pearl origin myths, one of the most widespread in Western European culture was handed down to us by Pliny the Elder: a shell fertilized by dew would give birth to the pearl. This myth became a topos in the lapidaries and bestiaries of the Middle Ages, as well as in […]
Marine Bouvier (1) Abstract This article aims to explain the content of the experimental dissertation prepared by Marine Bouvier (2023) for her university diploma in gemology (DUG, Nantes entitled “Calculation methods of structural formulas for gemstones”. The utilities and uses of the structural formulas are explained, along with the percentage of pure pole components of […]
Chloé Picard (1) ABSTRACT The adjective sustainable (“durable” in French) is, according to the French dictionary Petit Robert, “likely to last a long time”. Still according to this noble book, a company is defined as “an organization for the production of goods or services of a commercial nature”. To last, a company must, among other […]
Emmanuel Fritsch1, Nicolas Hébert2, Feodor Blumentritt1,3, Cassandre Moinard1 ABSTRACT A parcel of 13 kg of hackmanite from the Mogok area, Myanmar triggered some surprising observations that contribute to the knowledge of hackmanite, the photochromic variety of sodalite. Firstly, we point out that nearly 350 samples reach exactly the same color saturation under UV-rich natural sunlight […]
Hélène Bureau (1) ABSTRACT High pressure and high temperature experiments performed in the laboratory are used to understand how diamonds are formed in the deep Earth. To achieve this purpose, we grow diamonds similar to natural diamonds, having trapped the same kind of impurities than observed in natural ones. We show that natural diamonds of […]
Marine Bouvier (1) ABSTRACT In this article, the author chose to reveal the secrets surrounding two surprising samples of aquamarine from her collection, through the reading and understanding of their inclusions, emphasized both for their beauty and for their remarkable gemological qualities. In the first sample, a star Brazilian aquamarine cabochon, it is possible to […]
Féodor Blumentritt(1) & Franck Notari(1) ABSTRACT We were fortunate to observe and analyze a remarkable 9.89 ct zircon showing a strong color change from vivid orange to dark brown after longwave ultraviolet illumination (excited state). Its color comes back to vivid orange after being kept in the dark at room temperature for several months, or […]
GemGenève est de retour pour une nouvelle édition du 1er au 5 novembre 2023. A cette occasion, l’association est toujours partenaire du salon avec plusieurs rendez-vous : 1- Table ronde « Acheter un bijou ancien » – Le 3 novembre de 16h30 à 17h30 Acheter un bijou ancien, c’est – souvent – acheter un bout d’histoire et […]
C’est avec beaucoup de fierté et de joie que nous vous annonçons la sortie du deuxième numéro de la revue GEMMES. Au sommaire de ce numéro, vous retrouverez les contributions de Éloïse Gaillou, Féodor Blumentritt, Franck Notari, Yolchanok Srinaka, Natthawut Saenkuntha, Ingrid Lerouyer, Marine Bouvier, Marie Chabrol, Charline Coupeau, Jean-Pierre Gauthier, Jacques Fereire, Thanh Nhan […]
