Rules for Planar Tuning Forks

UNTUNED (25 gp) x5
COMMON (100 gp)
The Ethereal – Bone – (E minor)
Plane of Shadow – Aszite – (B flat)
Acheron – Acheronian Clearsteel – (D minor 7th)
Ygdrasil – Ironwood – (A)
The Prime – Gold – (E19 – C major)
Plane of Air – Inubrix – (G major)
Plane of Fire – Fire Forged Steel – (C sharp)

UNCOMMON (2,000 gp)
The Astral – Elserryn Cluster – Black Mithril – (A flat)
The Dreaming – Rajrin – Singing Steel – (G major 7th)
The Quasi-Elemental Plane of Mineral – Beyshk – (A sharp) – acquired from K’chak

RARE (20,000+ gp)
The Harrowing – Electrum – (F augmented)
The Shifting Prime Key – Noqual – (C suspended 7th))