Hi Flowerbeads, Your flower beads intrigue me. Sound lovely!
While I don' t have THE ANSWER, below are some of my ideas for possible "glass like" exploration/experimentation. Maybe you will find something that will work for you.
I see the challenge as two fold. #1 Finding the best translucent PC brand to meet your needs. #2 finding a finishing procedure (i.e.buffing/sanding followed by varnishing) to achieve the max shine possible.
All translucent PC brands are not created equal. (Translucent PC is not transparent. I think you'd need a resin for transparent).
Ginger at Blue Bottle Tree http://thebluebottletree.com/translucent-polymer-clay-faq/
Achieving a glassy finish on PC hints below:
Finishing Sanding Buffing http://forums.delphiforums.com/polymerclay/messages/?msg=64038.1
directions to make super shiny with varnish/Varathane http://melobeau.blogspot.com/2014/03/tute-varnishing-polymer-clay-with.html
glassy beads from Polymer Clay http://melobeau.blogspot.com/2010/05/cinco-de-mayo-fiesta-necklace.html
Anita in AZ