Also worth checking out, the $10 Open Source spectrometer that attaches to your phone. http://store.publiclab.org/products/foldable-mini-spectrometer http://st

Also worth checking out, the $10 Open Source spectrometer that attaches to your phone. http://store.publiclab.org/products/foldable-mini-spectrometer http://store.publiclab.org/products/foldable-mini-spectromet... The challenge seems to be to understand how to interpret the results. SpectralWorkbench.org is place that folks are sharing scans and comparing. http://spectralworkbench.org/ http://spectralworkbench.org/