Last Updated: Oct 20, 2016 Views: 50
I talked with a scientific glassblower friend, Sally Prasch, who told me she sometimes decorates petri dishes (and other scientific glass).
Other scientific glassblowers may add personal touches to the glass they make -- as a "whimsey." I did not find this documented in our books or catalogs.
This may be a fairly recent development because colored borosilicate glasses have become readily available now.
You may wish to contact the American Scientific Glass Society: http://asgs-glass.org/mo/index.php/homepage
If you wish to talk with Sally, she is listed on the "Find a Glassblower" page, under the Northeast: http://asgs-glass.org/mo/index.php/northeast