Spectrum Vis-NIR reflectance spectra of Iceland sand with 30.41% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 29.55% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 28.57% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 26.62% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 25.65% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 23.70% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 22.73% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 21.86% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 20.89% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 20.13% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 19.05% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 18.29% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 17.42% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 16.45% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 15.26% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 14.61% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 13.31% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 12.01% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 10.39% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 9.52% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 8.77% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 7.90% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 6.93% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 6.06% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 4.98% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 4.33% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 3.68% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 3.03% humidity Spectrum Vis-NIR reflectance spectra of Iceland sand with 2.60% humidity