This beads are carved from banded onyx (BO). They are 2" in
outer diameter, 7/8" thick, and 7/16" in hole diameter.
They can be used to build a toy car, a top, a
counter weight, etc. in numerous decoration and science projects! It
is ideal to build a huge, museum quality abacus, the first manual
calculation machine developed in China around 300AD and is still popular
in the Orient.
If you build something interesting, please share
your creation with our customers so that they and their kids can have some
fun too, and they will thank you for sharing your idea and achievements! |