This dataset currently contains the spectral reflectance of 532 samples of natural objects, ranging from 400 to 1000 nm in four nm increments. These records correspond to plants (302 samples), animals (167 samples), and stones (63 samples). The objects were collected in the field, purchased at local fruit and vegetable markets, or borrowed from museum collections in San Miguel de Tucumán, Argentina.

The dataset is deposited in Figshare, and you can have access from here: 

GUTIÉRREZ, MARCELO AGUSTÍN; Silva, Bárbara; Fanchini, Jose Maria; Morimoto, Takuma; Barrionuevo, Pablo; Sandoval Salinas, María Leonor (2024). Spectral dataset of natural objects’ reflectance from the Southern cone of South America. figshare. Dataset. https://doi.org/10.6084/m9.figshare.25705380.v4

If you use this dataset, you have to cite our related paper: 

Gutiérrez, A., Silva, B., Fanchini, J.M. et al. Spectral dataset of natural objects’ reflectance from the Southern cone of South America. Sci Data 12, 594 (2025). https://doi.org/10.1038/s41597-025-04675-9