on the cave wall there are 3 symblos, what do they say?
I was just referring to a post on the SU Reddit where someone was attempting a decipher. Using their coding, and the symbol references to BD and PD, I believe the doorways are designating which areas of the kindergarten produced gems for Blue Diamond (the backwards E character, sort of door shape, and DA symbol with a tick mark next to BD's color) and Pink Diamond (the E on its back, the tree-ish shape, and the DA symbol with the tick mark next to PD's color). The cipher the OP created works for these. ((ex: 'SA-KA' in the cipher translates to Pink Diamond))You can read it here