At 75 Smithing you can take this dust and either a Crystal tool seed, Crystal armour seed, or Crystal weapon seed to the Singing bowl north of Lady Ithell and make your own Crystal equipment.
A Crystal pickaxe or Crystal hatchet can be made by taking 4,000 Harmonic dust and the respective dragon tool to Lady Ithell to have her encase them in crystal for you.
This Data was submitted by: Javezz and Jakesterwars.
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