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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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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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Mundrabilla iron meteorite
https://australian.museum/learn/minerals/mineral-factsheets/mundrabilla-iron-meteorite/Iron meteorites such as Mundrabilla are thought to have been originally part of the metallic core of an asteroid, broken up through collisions in the Asteroid Belt.
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Corundum (sapphire) with diamonds in a platinum ring
https://australian.museum/learn/minerals/mineral-factsheets/corundum-diamonds-platinum-ring/Sapphire (aluminium oxide) can be many colours, but the beautiful blue we see most often is from traces of iron and titanium.
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