As nouns the difference between jackstone and packstone
is that jackstone is a jack; one of the playing pieces in the game of jacks while packstone is a kind of grain-supported calcareous rock containing lime mud.
jackstone
English
Noun
(
en noun)
A jack; one of the playing pieces in the game of jacks.
Derived terms
* jackstone calculus
packstone
English
Noun
A kind of grain-supported calcareous rock containing lime mud.