Proof of observation + general conclusions requires replication and validation. So how do we do that?

There are other methods available that can offer higher quality data. However, these methods can be expensive and often require that the sample be destroyed.

Xray Diffraction (XRD) offers specific mineral identification down to end members of mineral groups. This helps validate minerals we are able to primarily identify in the spectra. Samples are destroyed in the process

Scanning Electron Microscope (SEM) Imaging allows for us to confirm mineral / alteration associations. We can be certain which primary minerals are altering to which secondary minerals. We can also get textures from both primary formation OR from alteration. We can also collect data on rarer elemental associations that may not show up in XRD or Spectroscopy. Samples are semi-preserved, as they are polished down into a thin section.

Xray Flourescence (XRF) offers specific elemental abundances in a sample. Although we cannot obtain mineral identification, changes in elemental abundances over a spacial unit can tell us changes in geochemistry. Depletion or enrichment of certain elemental groups provide critical information about the type of geochemical system you are observing. Samples are destroyed in the process.