Hi Mack,
This is probably nothing like what you intend to do with your flint - but I thought I'd contribute to the thread anyway....being as I quite like the look/feel of flint in any form

A friend of mine has a fabulous collection of around 50 Neolithic flint tools, rather like these in the pic below......
http://www.askabba.com/Arrowheads.JPG
She and her husband were farmers and found the flints when they were ploughing their land near Arbor Low Stone Circle....
Arbor Low Stone Circle and Gib Hill Barrow : Derbyshire : East Midlands : Find a property by map : Properties : Days Out & Events : English Heritage
They have even had interest (a few times) from the British Museum - but they wont part with their collection!
To be honest, neither would I!
Tracey