spica82,
breaking a suspected t.cement vault is as surprising as winning a lottery at least
, if and only if, it its really a cemented t.vault. you can check it with metal detector, if it yields positive in metal presence, you have 50% of chance, if your metal detector has descrimination that can tell if its ferrous or non-ferrous, you got a higher percentage of hitting a t. but beware that this confirmation makes commotion, the adrenalin rush that makes our normal decision blocked by greed and wild dreams. there are few who succeed in ripping the harvest as a group because of humility. but seldom ends in one persons victory due to greed.
so be careful on that cement vault. if you are willing to give away your share to those who becomes greedy, then you can go breaking that vault....Peace!
ps....can u post a picture of you vault...