  Eggs. 
These lovely artificially grown bismuth eggs show what you can do if you learn to control the conditions of crystallization.  Based on our experiments, I think it's safe to say these probably take just a few minutes each to make, once you get the system down. 
Source: Mr. Bismuth 
Contributor: Ed Pegg Jr 
Acquired: 15 April, 2002 
Price: $20 
Size: 2" 
Purity: >99%
 |  
  |  
 |  
  |