How much is opal worth per carat?

Because there are so many different types of opal in Australia, the cost can vary from $10 to $6,000 per carat.

What is a carat of opal?

The weight of an opal is measured in grams.

What color opal is most valuable?

The black opal is black.

What type of opal is most valuable?

The black opal is black.

What type of opal is most valuable?

The black opal is black.

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