White pearls are alleged to be a representation of purity and health.  
 
Cream colored pearls are believed to be a sign of great victory and joy for the wearer.   

Silver pearls represent endurance and provide the wearer a aspiration to continue onward when things become discouraging.  

The significance of the Gold pearl is wealth. They are said to be a sign of a wealthy person or a person destined to attain great wealth.

Pink/Peach pearls represent  love or a loving nature. It shows that a person is devoted to another and also that a person has a loving personality.
 
The Lavender pearl is said to be the pearl of wisdom, love and royalty. It is also presumed to be associated with a spiritual essence. 

Black pearls, while beautiful and somewhat rare have a more mystifying meaning. The significance of these is considered to be a sign of mystery, exquisiteness and prosperity.