For the dust gained from Ithell harps, see Harmonic dust.
Harmony dust detail

Harmony dust is an ingredient used with a juju fishing potion to make a perfect juju fishing potion. It can be obtained by grinding down small, medium or large crystal urchins. It takes 10 small (worth 10 crystal urchin points), 7 medium (14 points), or 5 large urchins (15 points) to create one harmony dust.

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