Fast glue - super glue & soapstone glue
Super glue, e.g. cyanoacrylate, is very good for filling small cracks, especially in dense stones such as soapstone or serpentine to fill small cracks and quickly glue broken pieces back into place as you work. In addition, the colourless glue is also good for white-transparent alabaster as long as it is not very brittle stone.
STEACOLL soap stone glue, unlike most other stone glues, is solvent-free, which means that even children can work with it safely.