The Moon’s Tear is an item in The Legend of Zelda: Majora’s Mask. It’s a magical rock that fell from the Moon. The Moon’s Tear can be obtained outside the Astrologer’s Planetarium after Link uses the telescope to gaze at the Skull Kid atop the Clock Tower. The Astrologer also has another Moon’s Tear on display in his Planetarium. It can be traded in South Clock Town to a Deku Shrub for a City Title Deed.
I was always caught by the emotion of that moon. Would he really cry because of all the bad things Skull Kid did? Man, Nintendo really caught a cool atmosphere in Majora’s Mask.
By Kaboom, Info from Zeldapedia