Gorgon's BreathConsumable 13
Source Pathfinder #149: Against the Scarlet Triad
Price 475 gp
Weight light
Gorgon's breath is a fine powder that can easily enter living creatures' bloodstreams through their lungs before binding to mucous membranes and causing any nearby soft tissues to harden.
Activate 
Interact (Inhaled)
Saving Throw DC 32 fortitude
Onset 1 round
Maximum Duration 6 rounds
Stage 1 Slowed 1 (1 round)
Stage 2 4d6 bludgeoning damage and slowed 1 (1 round)
Stage 3 Petrified (1 round)
Stage 4 petrified permanently
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
AlchemicalAlchemical items are powered by reactions of alchemical reagents. Alchemical items aren't magical and don't radiate a magical aura.
ConsumableAn item with this trait can be used only once. Unless stated otherwise, it's destroyed after activation. Consumable items include alchemical items and magical consumables such as scrolls and talismans. When a character creates consumable items, they can make them in batches of four.
InhaledThis poison is delivered when breathed in.
PoisonAn effect with this trait delivers a poison or deals poison damage. An item with this trait is poisonous and might cause an affliction.