Updated as of June 2026
Iolite vs Amethyst
| Iolite | Amethyst | |
|---|---|---|
| Price / carat | $15 to $150 | $5 to $60 |
| Hardness (Mohs) | 7 | 7 |
| Color | Blue, Violet-blue, Gray | Purple, Violet, Lavender |
| Treatment | Typically untreated | Heat treatment (to alter or deepen color) |
The bottom line
Iolite and Amethyst 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 Iolite and Amethyst.
Frequently asked questions
Is Iolite or Amethyst more durable?
Both rate Mohs 7, so they are comparably durable.
Which is cheaper, Iolite or Amethyst?
Iolite runs about $15 to $150 per carat and Amethyst about $5 to $60 per carat, so Amethyst is usually the more affordable choice.
Which should I choose?
Pick Iolite if you want blue tones and Amethyst if you prefer purple. Match the stone hardness to how you will wear it and let budget break the tie.