Spectroscopy for Gemologists

Euclase - UV-Vis spectra

Details

  • Light-greenish-blue euclase – (Brazil)
  • Blue euclase – 0.22 ct – Colombia
  • Colorless euclase - 6.15 ct crystal - Brazil

    • Light-greenish-blue euclase – (Brazil)

    uvvis euclase - light-greenish-blue (Brazil)
    Cr3+ spectrum with OH vibrationnal overtones at 980 nm

    Blue euclase – 0.22 ct – Colombia

    uvvis euclase 022 blue Colombia
    Cr3+ spectrum, Fe3+-Fe2+ IVCT is not observed although the stone color is deep blue

    Colorless euclase - 6.15 ct crystal - Brazil

    No spectrum