Updated as of June 2026
Chalcedony vs Agate
| Chalcedony | Agate | |
|---|---|---|
| Price / carat | $3 to $60 | $2 to $30 |
| Hardness (Mohs) | 6.75 | 6.75 |
| Color | Blue, White, Gray, Lavender | Multicolor, Gray, Blue, Brown, White |
| Treatment | Dyeing (some stones) | Dyeing (very common) |
The bottom line
Chalcedony and Agate 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 Chalcedony and Agate.
Frequently asked questions
Is Chalcedony or Agate more durable?
Both rate Mohs 6.75, so they are comparably durable.
Which is cheaper, Chalcedony or Agate?
Chalcedony runs about $3 to $60 per carat and Agate about $2 to $30 per carat, so Agate is usually the more affordable choice.
Which should I choose?
Pick Chalcedony if you want blue tones and Agate if you prefer multicolor. Match the stone hardness to how you will wear it and let budget break the tie.