Origin of jackstone
1805–15; earlier chackstone, alteration of checkstone pebble, of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for jackstone
In that instant, she looked at the jackstone players by the hearth.The Readjustment
Mr. Gates wants to double his bet on Jackstone,—make it $80,000!