It is my great pleasure to welcome you to the 3rd International Online Conference on Mineral Science (IOCMS 2026), which will be held online from 10 to 12 March 2026. This event is proudly organized by the MDPI open access journal Minerals (ISSN: 2075-163X; Impact Factor: 2.2; CITESCORE: 4.4) and continues the successful tradition of the previous editions. The primary goal of IOCMS 2026 is to bring together researchers and professionals from across the globe working in the broad field of mineral sciences—from crystal chemistry to environmental mineralogy, from extreme condition physics to extraterrestrial mineral exploration. We aim to provide a vibrant and inclusive platform for the exchange of cutting-edge research, ideas, and collaborations. One of the most significant advantages of this fully virtual conference format is the ease of participation—no travel is required, and scholars can join us from anywhere in the world. The event will feature live presentations, interactive Q&A sessions, and a virtual poster gallery, encouraging open dialogue and dynamic interaction among participants. The conference will be structured around several key thematic sessions, including: 1. Mineral Geochemistry: Environmental Applications and Recent Advances 2. Mineral Systems and Ore Deposits: From Formation to Exploration 3. Nanominerals and Clays: Emerging Applications in Materials Science 4. Minerals in Extreme Environments: From Earth's Depths to Space 5. Mineral Processing and Metallurgical Innovations: From Extraction to Refinement 6. Emerging Frontiers in Mineral Science: Breakthrough Areas and Future Directions We warmly invite you to submit your abstract and join this exciting global exchange. All abstracts will be peer-reviewed by the scientific committee and presented on the conference website. Participation is free of charge, and outstanding contributions will be eligible for conference awards. In addition, extended versions of the presented work (4–8 pages) may be published free of charge in the Environmental and Earth Sciences Proceedings, and authors will receive a 20% discount for submitting full-length papers to the Minerals Special Issue. I look forward to your participation and the engaging discussions that will shape the future of mineral science.