Nothing can really make it mature quicker, that I know of. How long has it been flowering, meaning pistils visible? Might be able to give you an idea based on that but it would be speculation at best. Growing a plant definitely isn't for the impatient. I have smoked enough premature herb that all I can say is you should wait for the right time. The small crystals you see may get a little larger as the plant matures too, they should swell up with thc rich resin. More pictures would help matters a bunch too. Hang in there!!