All can be directly obtained from the structure file in CIF format: crystal density, unit cell volume and space group. In addition, inspired by a recent study, we have also used several statistical features of the distributions of Si-O bond lengths and Si-O-Si angles. This information is obtained from the CIF file using the pymatgen library. We also used as descriptors a series of geometric parameters related to the nature of the zeolites' pore space, such as internal surface area, pore volume, size and channel dimensionality. These are also calculated by geometric methods from the structure files, at low computational cost using the Zeo++ software. A full list of all 32 descriptors can be found in the Supporting Information. Notably, this descriptor list does not include energy and all descriptors can be calculated by efficient and cheap methods with approximately 1.5 CPU seconds required for each structure.