Interesting article today in one of the Belgian online newspapers: the Diamond museum in Bruges hands out free diamonds till summer 2012, starting on Easter Monday.
The official websites states:
"Get a free polished diamond when seeing the polishing show.
One free diamond per 2 full paying participants. Discounted tickets (students, hotel etc) forfeit the offer"
MIND: there is only 1 polishing show per day, at 12h15. Be there at 12h00.