Unlocking the Secrets of Gems: From Myth to Modern Marvels 2025
8 minutos 2. The Geochemical Foundations of Gem Formation Understanding how gemstones originate begins with the study of geochemistry—the chemistry of Earth’s crust and mantle. The elemental composition of minerals plays a critical role in determining the types of gemstones formed. For example, the presence of aluminum and oxygen in the crystal lattice of bauxite leads to the formation of sapphires and rubies, both of which are corundum varieties but differ mainly due to trace elements like chromium and titanium that influence their vibrant Continue lendo→