Figures of the Article

• Ruby deposits and ruby sample deposits in Africa (quote from Google Map)
• Ruby samples from Guinea
• Characteristic inclusions in rubies from Guinea
• Characteristic inclusions in rubies from Guinea
• Cr/Fe distribution diagram of ruby samples from Guinea
• Relation between the ratio of Cr/Ga and Fe/Ti concentrations in ruby samples from Guinea
• Box plot of Fe content in rubies from different sources in Africa
• Relation between the ratio of Cr/Ga and Fe/Ti concentrations in ruby samples from different origins in Africa
• UV-Vis absorption spectra of rubies from Guinea
• FTIR absorption spectra of rubies from Guinea
• Raman spectra of rubies from Guinea
• Raman spectra of apatite in rubies from Guinea
• Raman spectra of diaspora in rubies from Guinea
• Raman spectra of rutile in rubies from Guinea