Opal Stones and Gems: Value, Price, and Jewelry Information

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Opal Stone Value

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1 to 5 carats

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5 to 10 carats

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10+ carats

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1 to 5 carats

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5 to 10 carats

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10+ carats

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1 to 5 carats

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5 to 10 carats

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10+ carats

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1 to 5 carats

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5 to 10 carats

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10 to 15 carats

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15+ carats

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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

All Sizes

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.4 to 1 carat

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1 to 5 carats

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5 carats plus

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.4 to 2 carats

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2 to 10 carats

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All Sizes

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Accompanying value information:

An Interview with Opal Expert Joel Ragan

Carbon spots in smoked opal - opal treatments

Opal Treatments: How to Detect Treated Opals

vintage opal glass ring - opal simulants

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 Guide

View Opal Stone Profile

The 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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