This Borosilicate Glass Murrine Cane, Mandala #1, could be used in borosilicate glass work or could be sliced and polished as coins. I lampworked the borosilicate murinne cane myself. This is from my second component murinne pull.
Mandala #1 Cane: largest Diameter = 16mm smallest Diameter = 13mm Length of Cane = 43mm Weight: 19.1 g
If you aren't familiar with murrine making here is a link about it: http://en.wikipedia.org/wiki/Murrine Recently, in the borosilicate glass world, it has become a highly collectible miniature form of art (reminiscent of micromosaics).