The Memory Crystal was a valuable memory storage device from the Mines of Marlion. They were known to be delicate, with the smallest of damage causing a crystal's stored memories to leak into the minds of those in proximity to it. (AUDIO: The Devil in Ms. Wildthyme [+]Loading...["The Devil in Ms. Wildthyme (audio story)"])
Iris Wildthyme used it to store her memories inside, which took a "ritual of fasting, praying and all kinds of rites" to perform. After she had accomplished this, The Head tried to take it from Iris, and it almost succeeding, but Panda managed to reclaim it and destroy it, with Iris losing access to the memories once contained within it. (AUDIO: Wildthyme at Large [+]Loading...["Wildthyme at Large (audio story)"]) This crystal was later theorised by Iris to have been damaged when she originally obtained it, some of her memories having later manifested within Panda a while later. (AUDIO: The Devil in Ms. Wildthyme [+]Loading...["The Devil in Ms. Wildthyme (audio story)"])
One memory crystal contained information regarding Iris' time working for MIAOW. Iris sought out the Map of Martian souls for Mida Slike in exchange for this crystal. (PROSE: Hang onto Yourself [+]Loading...["Hang onto Yourself (short story)"])