Thread: Help ID on this coticule

Hello all

I just got this Belgian natural combo (the one on the top) which has a very smooth feel and has no texture compared to the other one in the picture which by the way has some glittering spots. The dimensions are 175 mm x 42 mm x 19mm and also looks like a rarely used stone. Notice the stamp: "made in Belgium" Any info appreciated.

Thanks and sorry for the phone-picures that I will update with better ones if it gets some interest.