How do I calculate the gravity center of a group of different materials?

Hello everybody,

I need to calculate the center of gravity for a piece of jewelry containing metal and different stones. Which command shall I use ?

Thanks for your help



Hi Veronique- there is no tool for this built into Rhino - the scripts in PetersTools may help - see


Thank you Pascal, I’ll try that.


Hello @Veronique I have a Grasshopper definition that finds centre of objects and can then move then to centre. I use this sometimes when doing asymmetrical pendants and i have to know where to place bale so piece hangs straight.

Red box is original BREP and green id grasshopper moving to centre.

@pascal thanks for those, though not sure how to use his toolbar to find centre of object.