flinty

adjective4

1. •
   Resembling or containing flint; hard like flint.

   • It was late at night and frosty; high above them on the hills the cloppety clop, cloppety clop of a horse's hooves picking their way on the flinty stone track died away in the distance. — 1973
2. •
   Siliceous (including basanite).
3. •
   (figurative) Showing a lack of emotion.

   • Public opinion has turned flintier in recent years on welfare spending. — 2012
4. •
   Having a taste characteristic of certain white wines, especially Chablis, supposed to evoke the sensation of flint striking steel.

   • Wines can be described with words like cigar box and “pencil lead,” or flinty or with hints of sandalwood — oenophiles can veer into what many might deem pretentiousness pretty quick. — 2023