Does anyone has an idea about the material of this necklace? It is a huge necklace, quite heavy and it makes the bakelite sound when when the beads hit each other but it tests negative for bakelite. I purchased it on a Dutch marketplace website. The lady I bought it from (who collects jewelry herself) had no idea what material it was and it wasn't her style (nice of way of saying she hated it). I think it is beautiful whatever material it is. Could it be faturan?

The big beads are 4cm X 2cm, the smaller beads 1,5cm X 1,5cm. The weight is 227 grams (about half a pound).