Lampwork? Hand blown? What are these glass beads?

I wish I knew more about unusual glass beads but I am only slightly familiar with some styles and techniques. These beads look like they were made by melting ribbons or bands of colored glass--aqua, light green, lilac--and then pulled and pinched to form these triangular barrels. Each is about 7/8" long and 7/16" wide (23mm x 11mm). There is a different axis on each end. The opaque jadeite green glass beads are 11mm.

In some areas, you can see through the beads to the other so there seems to be a transparent, or nearly so, colorless buffer between the colors. At the ends of some beads, I see a white core, but not on all. There are small air bubbles in random places. The beads are very uniform in size and shape so I imagine it took a fair amount of talent to make them?

So, are these called lampwork? Blown glass (though I kinda doubt that) or something else? The round beads are sterling as is the 925 clasp. Thanks for your enlightening comments!

 

Venetian lampwork, best guess. Those don't have the clay cores of the modern junkier pieces.