Set for April 10–12 at Espace Charenton, Minéral Expo Paris will bring together nearly 200 exhibitors from more than 20 countries, filling 3,000 square meters with minerals, fossils, gemstones, and jewelry. With an expected 6,500 visitors, the show continues to build as a steady presence on the European calendar—now with both winter and spring editions.
But beyond the display cases and dealer tables, part of the conversation is shifting. While reviewing recent announcements, one presentation in particular caught our attention: “Gemstones: naming and regulation—understanding the 2002 decree.” It may not be the flashiest topic—but it goes directly to how gemstones are described, sold, and understood across the trade.
How Gemstones Are Named – and Why
At its core, gemstone nomenclature is about consumer clarity—ensuring buyers understand exactly what they are purchasing, without confusion or misrepresentation.
Readers of The Roskin Gem News Report may recall France’s recent reaffirmation that the term “lab-grown diamond” cannot be used in commercial descriptions, requiring instead the designation “synthetic diamond.” As outlined in France’s regulatory approach, the goal is to ensure that consumers are provided with clear, transparent, and relevant information so they can make informed purchasing decisions—free from confusion or deception.
That decision appears to draw directly from the framework established by the 2002 decree—one that governs how gem materials—including diamonds—are named and presented in commerce.
That’s the backdrop for this presentation—and the reason it matters.
Led by gemologist Alexandre Droux, the session focuses on how gemstones are named—and what those names are required to communicate. At the core is France’s 2002 decree on gemstone nomenclature, a regulatory framework that sets boundaries on how gem materials can be described in commercial contexts. It’s not something the public sees—but it directly affects how stones are presented at every level of the market, from dealer listings to the retail counter.
The session is expected to walk through the distinctions between natural stones, treated materials, synthetics, and imitations—categories that are familiar within the trade, but not always consistently communicated outside of it. The goal is straightforward: reduce confusion and tighten the language.
Droux brings a practical perspective to the discussion. His work spans laboratory analysis, lapidary experience, and teaching, including time at the Institut National de Gemmologie (ING). He also works directly with gemstone identification and nomenclature compliance under the 2002 decree, and has published research alongside Dr. Emmanuel Fritsch. In short, this isn’t theoretical—it’s day-to-day practice.
More Than Academic
For the trade, this is not just a regulatory exercise. Naming conventions are tied directly to value, disclosure, and consumer confidence. Whether the issue is treatments, synthetics, or imitations, the words used to describe a gemstone can shape both perception—and price.
A Broader Conversation
Droux’s presentation is part of a wider educational program at Minéral Expo Paris, reflecting the range of topics currently shaping the gem and mineral world—from science communication to market insights to emerging technologies.
Friday, April 10, 2026
2:00 PM – Room 1: Clément Emery
From Rocks to Stories: How to Make Science Accessible to Everyone
3:30 PM – Room 1: Dr. Stéphane Renard
Lithotherapy (the use of minerals for wellness, often referred to in the U.S. as “crystal healing”) from a scientific perspective
Saturday, April 11, 2026
2:30 PM – Room 1: Dr. Laurent Massi
Learning Gemology in the Age of Artificial Intelligence
3:30 PM – Room 1: Dr. Jean-Claude Boulliard
Behind the Scenes of the Global Mineral Market: A Look Back at Tucson
5:00 PM – Room 1: Alexandre Droux
Gemstones: Naming and Regulation—Understanding the 2002 Decree
Workshop
GemJunior – Introduction to Gemology for Children
Saturday, April 11 & Sunday, April 12
2:30 PM – 5:00 PM
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