Is scone pronounced scON or scONE?

Tutoring English, pronunciations can be interesting. The tutor checks two different ones for scone.

As a kid, I heard scone pronounced scon; out west, I more often here scone.

Apparently, both pronunciations are correct.

Source:

Barber, Katherine, et al (editors). Oxford Canadian Dictionary of Current English. Don Mills: Oxford University Press, 2005.