How do you destroy a horcrux?

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No: HPFGUIDX 133191

I haven't read HBP a second time yet, so forgive me if I missed the
information. Was it ever discussed/revealed by Dumbledore how to
destroy a horcrux? Dumbledore basically lost his hand during the act
of destroying the ring horcrux, but did he ever specifically say how
it was done? When Harry finds another horcrux, will he know how to
destroy it?
Peggy