Table 1 Data characteristics related to different gemstones for statistical modeling in two cases of before and after combining.

From: Jewelry rock discrimination as interpretable data using laser-induced breakdown spectroscopy and a convolutional LSTM deep learning algorithm

Stone

Agate

Calcite

Turquoise

Lapis lazuli

Number of spectra before combining

43

20

59

46

Number of features after combining

1806

380

3422

2070