They do not look like Hubbell beads to me. Hubbell beads have a different way of mimicking turquoise, generally done with frit (crushed glass) on a white base.
I do not know too much about Rousselet beads, but that could be a possibility. Might be good to get a better idea of the holes. The Czechs use mandrels with clay to remove the beads, while I believe Rousselet used (like the Venetians) copper based mandrels that were dissolved in acid to get the bead.

There are some marks on the holes that also make me wonder if you are completely sure they are glass.