Reference Spectral Library

Browse reference spectra from the USGS Spectral Library Version 7 and other curated sources. Each spectrum includes interactive plots, metadata, and downloadable data.

	Formula	Modality	Category	Source
Acmite	—	NIR	Mineral	USGS
Actinolite	—	NIR	Mineral	USGS
Actinolite	—	FTIR	Mineral	USGS
Albite	—	NIR	Mineral	USGS
Albite	—	FTIR	Mineral	USGS
Albite NMNHC5390 74-250um	—	NIR	Mineral	USGS
Albite NMNHC5390 74-250um	—	FTIR	Mineral	USGS
Alizarin crimson (dk)	—	NIR	Man-made	USGS
Allanite	—	NIR	Mineral	USGS
Allanite	—	FTIR	Mineral	USGS
Almandine	—	FTIR	Mineral	USGS
Almandine	—	NIR	Mineral	USGS
Alunite	—	FTIR	Mineral	USGS
Alunite NH4+Jaro	—	NIR	Soil	USGS
Alunite NH4+Jaro	—	FTIR	Soil	USGS
Alunite RES-2 K Syn (450C)	—	NIR	Mineral	USGS
Alunite RES-3 Na Syn (450C)	—	NIR	Mineral	USGS
Alunite RES-4 Na Syn (300C)	—	NIR	Mineral	USGS
Alunite RES-9 Summitv (400C)	—	NIR	Mineral	USGS
Ammonio-Illite-Smect	—	FTIR	Mineral	USGS
Ammonio-Illite-Smect	—	NIR	Mineral	USGS
Ammonio-Jarosite SCF-NHJ	—	NIR	Mineral	USGS
Ammonio-Smectite	—	NIR	Mineral	USGS
Ammonium Chloride	—	NIR	Man-made	USGS
Amylose potato SA-A0512	—	NIR	Organic	USGS
Analcime GDS1 Zeolite	—	FTIR	Mineral	USGS
Analcime GDS1 Zeolite	—	NIR	Mineral	USGS
Andalusite NMNHR17898	—	NIR	Mineral	USGS
Andalusite NMNHR17898 lggr	—	FTIR	Mineral	USGS
Andalusite NMNHR17898 lt74um	—	FTIR	Mineral	USGS
Andesine	—	FTIR	Mineral	USGS
Andesine	—	NIR	Mineral	USGS
Andradite	—	FTIR	Mineral	USGS
Andradite	—	NIR	Mineral	USGS
Anhydrite	—	FTIR	Mineral	USGS
Anhydrite	—	NIR	Mineral	USGS
Annite	—	NIR	Mineral	USGS
Annite	—	FTIR	Mineral	USGS
Anorthite	—	FTIR	Mineral	USGS
Anorthite	—	NIR	Mineral	USGS
Anthophyllite	—	NIR	Mineral	USGS
Anthophyllite	—	FTIR	Mineral	USGS
Anthophyllite	—	UV-Vis	Mineral	USGS
Antigorite	—	UV-Vis	Mineral	USGS
Antigorite	—	FTIR	Mineral	USGS
Arsenopyrite	—	FTIR	Mineral	USGS
Arsenopyrite	—	NIR	Mineral	USGS
Asphalt Shingle	—	NIR	Man-made	USGS
Asphalt Tar	—	NIR	Man-made	USGS
Augite	—	NIR	Mineral	USGS