4: The Chemistry of Gemstones Last updated May 6, 2022 Save as PDF 3.1: Origin Determination 4.1: Chemistry of Gemstones Page ID3192 gemologyGemology Project ( \newcommand{\kernel}{\mathrm{null}\,}\) 4.1: Chemistry of Gemstones4.2: Isomorphous Replacement4.3: The Chemical Classification of Gems and Minerals