In front of the altar are three large objects: a Mysterious Chest, a Mysterious Sand, and a Mysterious Tree. None act as their normal counterparts are supposed to (the chest is unusable, the sand cannot be picked up, the tree has no wood or fruits to give) You can only meditate on this altar if you have successfully meditated on the first one and received your Meteor Fragment.
Around 5:45am the next game day (approximately three real-time hours later) another message appeared to the people by the second altar: "A strange wind gusts through the area and then quickly dies down." The three objects suddenly gained new menu options to "Examine this Mysterious [object]." The entries:
The mystery continues, but this puzzle is solved! Industry is the word. In Dust Tree. Thank you Asum! When you have successfully meditated with the correct word on this altar you receive an "Unusual Stone". You can no longer meditate at the altar after collecting the Stone.
MESSAGE: "Your meditation reveals an image of the past: A once lush land that has lost it's luster, now shrouded in a haze of pollution and littered with abandoned buildings of industry. The gods seem displeased."
Screenshots can be found here.