Indonesia? Large Round, Matte, Black & White Focal Beads, 20mm Diameter, Sold in Sets of 3

These beads are priced and sold by the set of 3 Large round white glass beads 20mm diameter with an inset band of black, white and brown mosaic cane slices. These came to me as part of a collection and I don't really know where they are from. I can rule out most places, which leave Indonesia with a question mark. Beady friends I've showed them too agree Indonesia is likely. Why? Because it's a relatively new industry evolving very fast.