Classic Diamonds was created in 2003-12.
Diamonds Diamonds was created in 1982.
In classic Minecraft (versions prior to Beta 1.3), diamonds were not available. Diamonds were introduced in Beta 1.3, which was released in August 2011. Prior to that update, players did not have access to diamonds, and the game's resources were more limited. If you are playing a version of Minecraft that is Beta 1.3 or later, you can find diamonds deep underground and mine them with an iron or diamond pickaxe.
Carolina Diamonds was created in 2004.
Helzberg Diamonds was created in 1915.
Diamonds International was created in 1986.
Auckland Diamonds was created in 1998.
Dayton Diamonds was created in 2008.
Coster Diamonds was created in 1840.
The Four Diamonds was created in 1972.
Spence Diamonds was created in 1978.
Denver Diamonds was created in 2005.
Dallas Diamonds was created in 2002.