I love the whole idea of "peeking inside" a bead. If you scroll through my past postings to August 18, you'll see I was playing then with a "peek inside." At that time, I used filled shapes covered with mica shift. The openings in the top of the lentil shapes revealed various inclusions, such as crystals and enamel flowers.
The bottom photo shows something else new. I decided to see how things would look if the front section was larger and more open. This also gave me the opportunity to use some liquid polymer pieces I made. I love the effect they create in these focals. In case you're curious, the middle piece is a hollow lentil with mica shift veneer.