copying bootable image from eMMC to SD

I currently have a BeagleBone black that runs Angstrom from the on-board memory (eMMC) with a few additional modifications, user code, etc… I would like to copy the image to an SD card so that the image is bootable. (Can insert into any BeagleBone and run from SD card).

I found this article: but it seems to cover copying from eMMC → SD → eMMC. I’m not sure if the the SD data that it creates is a bootable image?

Thank you,