InsaneJournal

Level: Easy for Users | Advanced for memory extraction
Subject: Runes & Charms

The Pensieve is a magical object used to review memories. It has the appearance of a shallow stone or metal basin, into which runes and strange symbols are carved and precious stones are fitted. It is filled with a silvery substance that appears to be a cloudy liquid/gas; the collected memories of people who have siphoned their recollections into it. ~ Wikia

Game Canon
+ Pensieves are usually inherited by trusted family members or burried w/ it's owner.
+ Retrieving memory spell requires the memory holder think/speak of the memory at time of extraction.
+ Memories can be extracted by third parties, but memory holders must think/speak the memory.
+ Memories can be false - due to false memory synapsis.
+ Memory retrieval magically dublicates/records the essense of synapses that occurs during the brain's memory recall process.