Updated as of June 2026
Amethyst vs Aquamarine
| Amethyst | Aquamarine | |
|---|---|---|
| Price / carat | $5 to $60 | $30 to $600 |
| Hardness (Mohs) | 7 | 7.75 |
| Color | Purple, Violet, Lavender | Blue, Blue-green, Pale blue |
| Treatment | Heat treatment (to alter or deepen color) | Heat treatment (to deepen blue) |
The bottom line
Amethyst 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 Amethyst and Aquamarine.
Frequently asked questions
Is Amethyst or Aquamarine more durable?
Aquamarine is harder (Mohs 7.75 vs 7), so it resists scratches better.
Which is cheaper, Amethyst or Aquamarine?
Amethyst runs about $5 to $60 per carat and Aquamarine about $30 to $600 per carat, so Amethyst is usually the more affordable choice.
Which should I choose?
Pick Amethyst if you want purple tones and Aquamarine if you prefer blue. Match the stone hardness to how you will wear it and let budget break the tie.