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Topaz
https://australian.museum/learn/minerals/gemstones/topaz/Facts about Topaz.
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Sapphire and Ruby
https://australian.museum/learn/minerals/gemstones/sapphire-and-ruby/Facts about Sapphire and Ruby.
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Igneous rock types
https://australian.museum/learn/minerals/shaping-earth/igneous-rock-types/Igneous rocks can be divided up into four groups, based on how they were formed and what they are made of.
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Volcanic landforms
https://australian.museum/learn/minerals/shaping-earth/volcanic-landforms/Each type of volcanic massif (structure) contains lavas, pyroclastic rocks and intrusions, but these differ in proportions and compositions.
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Sedimentary processes
https://australian.museum/learn/minerals/shaping-earth/sedimentary-processes/Sediments are formed by the breakdown (both physical and chemical) of pre-existing rocks, which may be of igneous, metamorphic or sedimentary origin.
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Pyromorphite
https://australian.museum/learn/minerals/mineral-factsheets/pyromorphite/Pyromorphite (lead chloro-phosphate) was a common mineral of the oxidised zone of the Broken Hill orebody, and exceptional specimens of various crystal forms and colours were found.
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Anglesite on Cerussite
https://australian.museum/learn/minerals/mineral-factsheets/Anglesite-on-cerussite/This reticulated cerussite (lead carbonate) has a sugar-like coating of anglesite (lead sulphate).
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Banded Iron Formation
https://australian.museum/learn/minerals/mineral-factsheets/banded-iron-formation/Weighing a whopping 437 kg, this spectacular specimen is part of the Archean Nimingarra Formation of Western Australia and illustrates a dramatic change in Earth’s past atmospheric conditions.
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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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