to get rocks like that,simply put your DMT powdery flakes in a beaker and put in a hot water bath till it all melts and comes together as a liquid.I tilt my beaker to get it all on one side and take off the heat and let cool back to room temp.that's it just use a knife to get it out of the beaker and what 's too stuck in the beaker don't matter you can use it with next batch or redizzolve it and add to next batch before freeze precipitating