Opal Stone Value
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Black Opal - Tone N1 to N4
1 to 5 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
5 to 10 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
10+ carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
Dark Opal - Tone N5 to N6
1 to 5 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
5 to 10 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
10+ carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
Light Opal - Tone N7 to N9
Body Tone
N7
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
Body Tone
N8
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
Body Tone
N9
Below Commercial
- /ct
Commercial
-
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
Crystal Opal
1 to 5 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
5 to 10 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
10+ carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
Boulder and Matrix Opal
1 to 5 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
5 to 10 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
10 to 15 carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
15+ carats
Below Commercial
- /ct
Commercial
- /ct
Good
- /ct
Fine
- /ct
Extra Fine
- /ct
Composite Opals
Doublets prices are usually 15% to 35% of the value of similar looking natural, (solid,) gem. However, they occasionally run as high as 50% of a natural opal if they are of exceptional quality. Triplets are only about 1% of the value of an equivalent natural and peak at $500.
Other Opal Types
Contra Luz
All Sizes
Contra Luz
to /ct
Fire Opals - Faceted
.4 to 1 carat
Faceted
to /ct
1 to 5 carats
Faceted
to /ct
5 carats plus
Faceted
to /ct
Fire Opals - Cabochons
.4 to 2 carats
Solid
to /ct
In Matrix
2 to 10 carats
Solid
to /ct
In Matrix
to /ct
Pink Opal
All Sizes
Pink Opal
/ct
An Interview with Opal Expert Joel Ragan
Opal Treatments: How to Detect Treated Opals
Opal Simulants: How to Spot Imitation Opal
Synthetic Opal Types
Eight Opal Types Explained
An Incredible Union of Colors: Choosing Opal Engagement Ring Stones
Opal Buying GuideThe International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.
Evaluating precious opal is a highly refined art. For details, see our articles on Appraising Opals and our Opal Buying Guide.
78 opal cabochons from Welo, Ethiopia (52 ctw) in 18k gold bracelet. © Rob Lavinsky, www.iRocks.com. Used with permission.
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