>>7943379no, ь is the soft sign, similar to your j. ъ is the schwa. for example, if you want to phonetically spell nyet, you'd spell it ньeт
in bulgarian stone is кaмък, кaмeн is just a name.
>>7943378>>7943380hmm maybe they had renovation work on one of the upper floors and they were using this to get rid of debris?