Blue diamonds
Blue diamonds get their colour from boron in the crystal: the more boron, the deeper the blue.
- In nature
- Rare and among the most prized.
- Famous stone
- The Hope Diamond, 45.52 ct.
- In RXXO
- 1 in 33 diamonds
Blue in RXXO
97diamonds like this in RXXO right now
Questions
What makes a diamond blue?
Blue diamonds get their colour from boron in the crystal: the more boron, the deeper the blue.
How rare are blue diamonds in RXXO?
About 1 in 33. Purple is the rarest colour in RXXO, colourless the most common.
RXXO numbers are the odds every mint draws from. Updated 8 October 2026.