Why is opal a non renewable resource?

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    This is an opal. Opal is a gemstone that takes a very long time – thousands to millions of years – to grow naturally in the Earth. While some people have been able to artificially manufacture opals in a laboratory, we’re not able to keep up with the amount being used from natural sources.

    Opal is non-renewable in the same way that oil is non-renewable. There is a finite amount that exists currently on earth, and it’s very difficult to replicate artificially.

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