Each part on the skull is numbered. Jaw is spring loaded. Skull cap is removable for further interior inspection. Included with the model is a sheet with each numbers name for identification.
Minerals Model Set, Build the most abundant silicate minerals including feldspar, quartz, olivine, pyroxenes, amphiboles, micas, clay minerals, Students Learn how models of silicate minerals are related to unit cell/crystal lattice structures, It has enough parts to construct