Sneerson by kmes
Disproved Theory
Recently acquired data disproves this theory, Lapis Is Blue Diamond Theory. We appreciate the attempt.

Lapis is Blue Diamond
Theory Information
Title Lapis is Blue Diamond
Author AndyToons
Illustrator Ronaldo Smith
Date of Publication May 16, 2015

Lapis Is Blue Diamond Theory states that Lapis Lazuli is the much speculated Blue Diamond.


  • During Mirror Gem Lapis asks the Crystal Gems "Did you even wonder who I used to be?!", which might imply that she was a high ranking gem.
  • She is also the strongest gem we have seen in the show thus far; she could beat Garnet (a fusion) with a cracked gem. Considering Garnet beat Jasper and Jasper couldn't beat Garnet without using her Gem Destabilizer, Lapis must stronger than both Jasper and Garnet.
    • If she is so strong then why didn't she just defeat Jasper with the Crystal Gems during Jail Break? Perhaps Lapis was scarred from the war and doesn't want to fight anyone anymore.

Possible Implications

If Lapis is Blue Diamond that means the "Diamond" name is just title to describe a Homeworld ranking. Instead of being Blue Diamond herself she might have been the heir to the Blue Diamond throne.

Related Theories

Blue Diamond

Rose trapped Lapis in the mirror

Contrary Theories

Lapis is a Former Crystal Gem

Disproved Theory

This theory was disproved in "The Answer", when we saw Blue Diamond with another gemstone location.