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Topaz
https://australian.museum/learn/minerals/mineral-factsheets/topaz-brazil/This huge, clear topaz crystal weighing 5.5 kg has a perfect and sharp crystal shape (orthorhombic crystal system) with a diamond-shaped cross-section.
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Jasperised wood
https://australian.museum/learn/minerals/mineral-factsheets/jasperised-wood/This polished, richly hued slice of jasperised wood is from the Petrified Forest National Park, which covers parts of Navajo and Apache Counties in north- eastern Arizona, USA.
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Manganite
https://australian.museum/learn/minerals/mineral-factsheets/manganite/Germany has produced some of the largest and best manganite (manganese hydroxide) crystals in the world, as shown by this superb example.
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Celestine
https://australian.museum/learn/minerals/mineral-factsheets/celestine/This large hollow geode lined with sky blue celestine crystals was purchased from a Victorian mineral dealer.
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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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Cracking the'genetic code' of gem stones
https://australian.museum/learn/news/blog/cracking-thegenetic-code-of-gem-stones/A research team led by Dr Lin Sutherland, a Senior Fellow in Geoscience at the Australian Museum, has completed a major study on 'genetic' signatures in Australian sapphires and rubies. The study combines precise trace element
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New Information from Old Specimens
https://australian.museum/learn/collections/natural-science/mineralogy/mineralogy-collection-new-information-from-old-specimens/In many ways the future and relevance of museum collections often depend on their past. Some specimens remain in the collections for a long time, sometimes over 100 years before they prove vital for current research projects.
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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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Machu Picchu and the Golden Empires of Peru
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Tails from the Coasts
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Wild Planet
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Minerals
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