Looking at the closest image, the large beads look very very authentic.
The smaller ones do look suspect to me. Everything else the seller has looks authentic. I've peered at the blue and white Venetian in Picard vol. 7 the seller mentions.

This is a strand I'd love to see in real life. Of course, understanding the possibility of well made new Chinese! But at the same time, rare authentic beads DO appear sometimes on the market.

Maybe JP can comment.