What's the deal with that? It happens maybe 1 in 10 times.
What exactly are you suppose to do.
Mark it, kill it, mine it, or what?
You would think it would be special, but unless I'm doing something wrong, I get far less from the big crystals.
Even when mined correctly the large crystal gives less than the standard 5 crystals, maybe that's intentional or maybe it's a bug, tbh these kind of irregularities/inconsistencies are common in the game, unfortunately.
Aurora Glade Diamond Legend [VV]