Updated as of June 2026
Moonstone vs Opal
| Moonstone | Opal | |
|---|---|---|
| Price / carat | $5 to $100 | $10 to $1,000 |
| Hardness (Mohs) | 6 | 5.75 |
| Color | White, Blue sheen, Peach, Gray | White, Black, Fire, Boulder |
| Treatment | Typically untreated | None for solid natural opal |
The bottom line
Moonstone and Opal 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 Moonstone and Opal.
Frequently asked questions
Is Moonstone or Opal more durable?
Moonstone is harder (Mohs 6 vs 5.75), so it resists scratches better.
Which is cheaper, Moonstone or Opal?
Moonstone runs about $5 to $100 per carat and Opal about $10 to $1,000 per carat, so Moonstone is usually the more affordable choice.
Which should I choose?
Pick Moonstone if you want white tones and Opal if you prefer white. Match the stone hardness to how you will wear it and let budget break the tie.