Updated as of June 2026
Tanzanite vs Aquamarine
| Tanzanite | Aquamarine | |
|---|---|---|
| Price / carat | $100 to $1,200 | $30 to $600 |
| Hardness (Mohs) | 6.5 | 7.75 |
| Color | Blue, Violet-blue, Purple | Blue, Blue-green, Pale blue |
| Treatment | Heat treatment (nearly all stones) | Heat treatment (to deepen blue) |
The bottom line
Tanzanite 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 Tanzanite and Aquamarine.
Frequently asked questions
Is Tanzanite or Aquamarine more durable?
Aquamarine is harder (Mohs 7.75 vs 6.5), so it resists scratches better.
Which is cheaper, Tanzanite or Aquamarine?
Tanzanite runs about $100 to $1,200 per carat and Aquamarine about $30 to $600 per carat, so Aquamarine is usually the more affordable choice.
Which should I choose?
Pick Tanzanite 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.