Check out this optical illusion of an endless whirlpool in a perfectly round shere.  This would be awe inspiring on your desk. 
 
Inspired by the Pacific Ocean this Kauai born artist has been blowing glass for over 20 years. 
Each piece is hand-sculpted and blown in an open flame and a technique called Murrine is used to add vibrancy and detail to each piece. 
 
Approx: 1.75 inches in diameter