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Oxidised zone copper minerals
https://australian.museum/learn/minerals/mineral-factsheets/oxidised-zone-copper-minerals/This stunning polished slice of blue chrysocolla (copper silicate with water), green malachite (copper hydroxy-carbonate) and brown ironoxide- stained jasper (silicon dioxide) is from the DeGrussa Copper-Gold Mine in the Pilbara Block of Western Australia.
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Topaz
https://australian.museum/learn/minerals/mineral-factsheets/topaz/This is a ‘Rembrandt of the mineral world’ – one of the world’s finest mineral specimens.
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Nephrite jade carving 'nurse with goats'
https://australian.museum/learn/minerals/mineral-factsheets/nephrite-jade-carving/Several mineral species are referred to as ‘jade’. However, ‘true jade’ or ‘precious jade’ is the mineral jadeite, a sodium alumino-silicate, formed under high pressure deep down in the Earth.
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Vanadinite on baryte
https://australian.museum/learn/minerals/mineral-factsheets/vanadinite-on-baryte/This specimen was purchased from Albert Chapman who bought it at the 1980 Tucson Gem and Mineral Show in the USA.
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Chalcedony with Chrysocolla
https://australian.museum/learn/minerals/mineral-factsheets/chalcedony-with-chrysocolla/These smooth, round masses of chalcedony with dispersed sky-blue copper silicate mineral chrysocolla line a cavity in oxidised copper ore.
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Quartz (Amethyst)
https://australian.museum/learn/minerals/mineral-factsheets/quartz-amethyst/These sharp, lustrous and transparent purple amethyst crystals are a variety of quartz.
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Elbaite Tourmaline (Rubellite)
https://australian.museum/learn/minerals/mineral-factsheets/elbaite-tourmaline/This particularly large and colourful columnar crystal of rubellite tourmaline has an attached milky quartz crystal.
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Adelie land meteorite
https://australian.museum/learn/minerals/mineral-factsheets/adelie-land-meteorite/This small meteorite (originally weighing one kilogram) was the first one discovered in Antarctica and was found by Francis Bickerton during Sir Douglas Mawson’s Australasian Antarctic Expedition of 1911–14.
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Water and sedimentary transport
https://australian.museum/learn/minerals/shaping-earth/water-and-sedimentary-processes/Water plays a vital role in most sedimentary processes. Pure water itself has little effect on rocks. It is the dissolved gases in water, particularly carbon dioxide, that cause the chemical decay of minerals and mineral dissolution.
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