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1 Dollar - Elizabeth II 4th Portrait - Treasures of Australia - Sapphires
| Issuer | Perth Mint |
|---|---|
| Year | 2007 |
| Type | Log in to see details |
| Value | 1 Dollar |
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| Composition | Log in to see details |
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| Reverse script | Latin |
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| Edge | Reeded |
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| Additional information |
Part of Perth Mint's "Treasures of Australia" series, this issue highlights the Anakie sapphire fields of central Queensland — one of the largest sapphire deposits ever discovered, worked commercially since the 1870s and still producing today. Australian sapphires long carried a market stigma for their strong blue-to-green color shift, considered less desirable than Kashmiri or Burmese material, until heat-treatment techniques in the 1980s improved their commercial appeal and repositioned Australia as a major supplier to the global gem trade.