SpectroscopyNOW is a site devoted to all aspects of spectroscopy, from Atomic to X-ray. It highlights all of the new developments in spectroscopy, and includes a chemometrics section. If you search “fossil” you will find an article about the work of William Schopf.
The RRUFF project is a database of mineral spectra, including apatite, aragonite and calcite, and other minerals that grow on or in fossils. From the website, “The RRUFF™ Project is creating a complete set of high quality spectral data from well characterized minerals and is developing the technology to share this information with the world”. RRUFF is a very useful resource for comparative Raman and XRD data.