Tumble, polish discover 8 of your gemstones with The Young Scientists Club place the stones in the tumbler turn the handle to remove rough grit from the surface, leaving behind a smooth, shiny gemstone test your observation skills with the help of an identification poster to name each one.
Tumble, polish discover 8 of your gemstones with The Young Scientists Club place the stones in the tumbler turn the handle to remove rough grit from the surface, leaving behind a smooth, shiny gemstone test your observation skills with the help of an identification poster to name each one.