An agate is a mineral that is a symbol of health, wealth and long life. Iranian sources say that an agate is a sign of great wealth.
large cut stone with a characteristic cat’s eye : material prosperity
little dark (black) stone: you can expect quarrels, disagreements
white or dark brown: financial prosperity
have jewelry with this stone: respect
buy an agate: happy love relationship
lose an agate: you will lose your chance to improve your living conditions
give an agate: a nice surprise
receive an agate from someone: the good news.