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https://www.youtube.com/@valls_geoconsultant?sub_confirmation=1 For more videos about geology, geochemistry, AI, and much more, please visit and subscribe for free here: Golden droplets- https://shorturl.at/fetV1 Geovoices- https://tinyurl.com/m23pp4pb News about geology- https://tinyurl.com/3979urhy Geo News Radio: https://shorturl.at/MwdSK Discover Hackmanite — the rare gemstone that can change color in seconds and reach values of up to $2,000 per carat. In this video, we explore one of the most fascinating yet underrated minerals in the gem world. Hackmanite is a unique variety of sodalite known for its remarkable property called tenebrescence, a reversible color change triggered by UV light. Watch as this stone transforms from pale tones into vibrant pinks and purples, then slowly fades back—again and again. We’ll cover: What hackmanite is and where it is found The science behind its color-changing ability Why high-quality specimens can be so valuable Why this gemstone remains largely unknown Whether you’re a geologist, gem enthusiast, collector, or simply curious about rare minerals, this is a must-see. Subscribe for more videos on geology, mineral exploration, and rare gemstones. The bridge between Academy and Industry! P. Geo. Ricardo A Valls, M. Sc. and Geo Gadfly Valls Geoconsultant ORCID ID- https://orcid.org/0000-0002-5421-0914 Scopus Author ID: 7003369619/35335510700 ResearcherID: S-6604-2018 If you like this content, please "buy me a coffee" https://www.buymeacoffee.com/goldendroplets #Hackmanite #Gemstones #Minerals #Geology #RareGemstones #Sodalite #UVReactive #Tenebrescence #MineralCollection #EarthScience