made from the coverstock,
or outter shell,
of bowling balls. There are two basic types of bowling balls currently in use:
polyurethane, or "urethane", and polyester,
or "plastic". Polyester is the most common
type used to make Bowlerite cabochons. Polyester Bowlerite
translucent, chatoyant and lightweight. It is also quite
soft and can easily be scratched but scratches can easily
be buffed out by hand. Despite its softness it is very tough and durable.
Bowlerite is available in many colors, shapes and sizes.