Hi mas2388
Actually that is a good question...sorry...I was going on and on...thought I would stop...dont want to bore anyone!
Here is the test: (there are a few ways to tell the diff..)
1. Finished leathers do not darken with water (put water on your finger and press into the leather)
2. Unfinished leathers will darken immediately with water (it dries so dont worry)
3. All shiny leathers are finished.
4. Unfinished leathers have no sheen at all...no reflective qualities
5. Finished leathers don't have the same "feel" as unfinished leathers which some call nude, others call full aniline ) which are buttery soft and grabby...like real skin....supper soft and squishy
Finishes on leather vary in application. The more perfect the hide the less finish needed to hide imperfections, so it is more expensive and more vulnerable to oil stains, water stains and fading. Most high end handbag leathers today seem to be mostly "semi aniline", which means they have very little finish so you can still feel " leather", but has a little protection...its the best of both worlds.
I hope that helps...!?
Barbara