Did You Know? Posted at 11/04/2010 08:48:00 PM 0 comments (+) ... that it takes 300 pounds of pressure per square inch to crack open the shell of a macadamia nut? Well, I just found out myself today! Isn't it amazing? No wonder it is so expensive! And according to the information I got from the web, it is really hard to crack open the nut without destroying it! And they're actually about 40-85% cheaper to buy if the shell is still on.