Many collectors of crystals
and gemstones particulary enjoy tumblestones.
Most crystals, gemstones, and other natural rocks are
available in the form of polished smooth "tumblestones".
These vary in size and are available in convenient sizes
to keep in a small purse, bag, or cashbox, to fill crackers,
and/or for use as small gifts or keepsakes. Some tumblestones
are used for crystal healingh, and may be
of interest to mineral collectors for their geological