Updated as of June 2026
Onyx vs Hematite
| Onyx | Hematite | |
|---|---|---|
| Price / carat | $3 to $40 | $1 to $25 |
| Hardness (Mohs) | 6.75 | 5.75 |
| Color | Black, White, Banded | Black, Gray, Metallic, Silver |
| Treatment | Dyeing (most black onyx) | Typically untreated |
The bottom line
Onyx and Hematite 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 Onyx and Hematite.
Frequently asked questions
Is Onyx or Hematite more durable?
Onyx is harder (Mohs 6.75 vs 5.75), so it resists scratches better.
Which is cheaper, Onyx or Hematite?
Onyx runs about $3 to $40 per carat and Hematite about $1 to $25 per carat, so Hematite is usually the more affordable choice.
Which should I choose?
Pick Onyx if you want black tones and Hematite if you prefer black. Match the stone hardness to how you will wear it and let budget break the tie.