@lindasees Linda, this is my stove's black glass cook top. I discovered the great reflective surface at my daughter's the other day, so I tried this on mine. I set my black computer bag behind it for a black background and then pulled up the "blacks" in Lightroom to get rid of any details of the bag.
Love the reflection and thanks for your tip top use cooktop and black bag. Great rig using your own stuff. We don't need expensive props to take awesome photos!