when I say they were not pebble shaped beads, then I was thinking of the big obvious pebble shapes like my new ones I showed on the previous posts.
They definitely were not perfect round beads, but roundish, yet not big bold pebbles....
and I have to admit that the picture is becoming vague - I have memory problems.
Is your client in the possibility to go and see the necklace in real?

They have a facebook page where you don't really see what they have. It contains mainly pictures from Vogue shootings with some of their necklaces, but it might be a way to contact them (see also their tel.).

https://www.facebook.com/pages/Galerie-Argiles/204137756269136