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Cuprite on Calcite
https://australian.museum/learn/minerals/mineral-factsheets/Cuprite-on-calcite/Emke Mine in Namibia has produced some very large cuprite (copper oxide) crystals, with some being of gem quality and able to be faceted into rare dark-red gemstones.
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Cutting gemstones
https://australian.museum/learn/minerals/gemstones/cutting-gemstones/Faceted gemstones reveal the inherent qualities of a mineral, such as colour (or lack of it), clarity, fire and brilliance, which might otherwise remain hidden.
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Mineral properties
https://australian.museum/learn/minerals/properties/Minerals can be identified using a number of properties. These include physical and chemical properties such as hardness, density, cleavage and colour, crystallography, electrical conductivity, magnetism, radioactivity and fluorescence.
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Geological origin of gemstones
https://australian.museum/learn/minerals/gemstones/geological-origin-of-gemstones/Gemstones are formed below the Earth's surface and can sometimes show traces of other minerals, called inclusions.
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Valuing gemstones
https://australian.museum/learn/minerals/gemstones/valuing-gemstones/Gemstones are valuable because they are a rare and desirable commodity. They also represent time and labour spent on cutting and presentation.
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Fluorite
https://australian.museum/learn/minerals/gemstones/fluorite/Facts about Fluorite.
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Cerussite
https://australian.museum/learn/minerals/mineral-factsheets/cerussite/This statuesque group of cerussite crystals has been an icon of our mineral collection for over 90 years.
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Smithsonite on Cerussite
https://australian.museum/learn/minerals/mineral-factsheets/smithsonite-on-cerussite/Smithsonite is usually white or cream, yellow or blue, but occasionally a trace of copper can give it a pleasing apple green colour, like this one.
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Malachite in Gossan
https://australian.museum/learn/minerals/mineral-factsheets/malachite-in-gossan/This is a very large and impressive malachite (copper hydroxy-carbonate) with rounded groups of green, radiating fibrous crystals of velvety texture, that was extracted from an open cavity in the mine.
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Pyrosmalite-(Mn)
https://australian.museum/learn/minerals/mineral-factsheets/pyrosmalite/Pyrosmalite-(Mn) is a very rare mineral, even rarer in large crystals.
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Tails from the Coasts
Special exhibition
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Burra
Permanent education space
10am - 4.30pm![]()
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RELICS
Special Exhibition
Opens 16 August 2025 -
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Minerals
Permanent exhibition
Open daily![]()
