Gemmologie & Francophonie Abstract Buying an antique piece of jewelry is – often – buying a piece of history and sometimes even a fragment of the History. Sentimental, historical and even financial value are often associated with the notion of lifespan. And yet, the materials used for jewelry are sometimes less precious than the contemporary […]
Aurélien Delaunay (1), Emmanuel Fritsch (2) & Ingrid Lerouyer (3) DOI : https://doi.org/10.63000/6zwK85TXb7 Abstract In a batch of variscite, one sample stood out because of its slightly different color and texture. Laboratory analysis showed that it is an antlerite, Cu3(SO4)(OH)4 a rare mineral that is generally better known in mineralogy than in gemology. This specimen […]
Stéphane Renard (1) DOI : https://doi.org/10.63000/dV5c4fH4R2 Abstract The art of stone or gem engraving was invented at the dawn of civilizations. It has played an essential role in the history of art and culture from its start to nowadays, evolving over the centuries to become a means of artistic expression.The earliest forms of glyptic art […]
Thomas Cagniard (1), Jean-Pierre Gauthier (2) & Jacques Fereire (2) DOI : https://doi.org/10.63000/wq5XXR9f68 Abstract Highlighted by popular belief, the eye of Saint-Lucia is a biomineral, which is of undoubted gemological interest by its nature and through its use. As gastropod operculum of the species Bolma rugosa, its name is not protected and may have been […]
C’est avec beaucoup de fierté et de joie que nous vous annonçons la sortie du troisième numéro de la revue GEMMES. Au sommaire de ce numéro, vous retrouverez les contributions de Stéphane Renard, Thomas Cagniard, Féodor Blumentritt, Aurélien Delaunay, Franck Notari, Ingrid Lerouyer, Boris Chauviré, Clara Allirol-Mouton, Marianna Corre, Emmanuel Fritsch, Chloé Picard, Lauriane Pinsault, […]
Jean-Pierre Gauthier (1), Jacques Fereire (1) & Thanh Nhan Bui (2) DOI : https://doi.org/10.63000/2v7Zd89UZz Abstract The flame structure of the red helmet shell, Cypraecassis rufa (Linnaeus, 1758) Among molluscs with so-called “porcelaneous” shells, consisting of non-nacreous aragonite, we chose a gastropod, Cypraecassis rufa, to show an example of flame structure on cabochon-cut samples. The crossed […]
Franck Notari (1) (2), Féodor Blumentritt (2), Yolchanok Srinaka (1), Natthawut Saenkuntha (1) DOI : https://doi.org/10.63000/546HduNg2 Abstract The popularity of Paraíba-type tourmalines is mainly due to their remarkable colour, often described as « neon » blue. Many tourmalines with this colour are traded under the label Paraíba, but sometimes mistakenly. Today, gemmological laboratories devote particular attention to […]
Aurore SAYS (1) DOI : https://doi.org/10.63000/i33EM7H9rc Abstract Jade is considered one of the most precious stones in the world. In Chinese, 玉 Yù is a word used to describe a very beautiful gem, it could also be simply translated by « precious ». It is the general name for “jade” and its different mineralogical varieties, such as […]
Marie Chabrol (1) & Charline Coupeau (2) DOI : https://doi.org/10.63000/G63qeC95cN Abstract The city of Hanau in Germany was one of the most important jewelry production centers of Europe between the end of the 19th century and the beginning of the 20th. It’s in this city that the Kreuter workshop was based, which ensured most of […]
Ingrid Lerouyer (1) DOI : https://doi.org/10.63000/h8Y99yeDB3 Abstract This article presents the main varieties of natural glasses and classifies them into three categories, each linked to their mode of formation. In the wild, glass can be found through volcanic, meteoritic impact or lightning-related events. At the end of this article, a table lists the characteristics and […]
