Updated as of June 2026
Kyanite vs Aquamarine
| Kyanite | Aquamarine | |
|---|---|---|
| Price / carat | $5 to $120 | $30 to $600 |
| Hardness (Mohs) | 6 | 7.75 |
| Color | Blue, Green, Black | Blue, Blue-green, Pale blue |
| Treatment | Typically untreated | Heat treatment (to deepen blue) |
The bottom line
Kyanite and Aquamarine both make beautiful jewelry. Choose by the look you want first, then weigh hardness against how hard you will wear the piece, and let price settle close calls. Read the full guides for Kyanite and Aquamarine.
Frequently asked questions
Is Kyanite or Aquamarine more durable?
Aquamarine is harder (Mohs 7.75 vs 6), so it resists scratches better.
Which is cheaper, Kyanite or Aquamarine?
Kyanite runs about $5 to $120 per carat and Aquamarine about $30 to $600 per carat, so Kyanite is usually the more affordable choice.
Which should I choose?
Pick Kyanite if you want blue tones and Aquamarine if you prefer blue. Match the stone hardness to how you will wear it and let budget break the tie.