I have cut many interconnects over the years (always very cheap generic ones) and i would say that most often (always?) I have found this construction, that i would call coaxial:
(The peeled conductor goes around the red cable)
For sure these, that nobody would call coaxial, also exist, but in my experience they are more rare, specially the second one:
The one that Amir reviewed linked above... i don't know, but i would expect that if you cut it it would be like the one in my first picture.
My 2cents.