the.com/pearl
the only gem made by something alive, and only when it's annoyed.
originOyster's response to an irritating intruder inside
natural rarityRoughly one in ten thousand wild oysters yields one
acid weaknessVinegar dissolves them; Cleopatra allegedly drank one
birthstoneJune's gem, the only one needing no cutting
layersMade of nacre, the same stuff lining shells