#673 Tuesday, March 31
I'm a reddish-brown opaque gemstone used since ancient times. What am I?
The daily Ryddle for Tuesday, March 17, 2026
I travel the world while stuck in a corner. What am I?
Think you know it? Play it to make your guesses, or reveal the hint and answer below.
I go on letters and postcards.
The answer is stamp.