Oxide Collection (page 5)

Plate 3 from Histoire naturelle? (1789)
Plate 3, Histoire Naturelle ou Mineralogie Complete from Histoire naturelle: ou, Exposition des morceaux, les mieux choisis pour servir (1789) by by Swebach Desfontaines

Sweetite
A Specimen from the collections held at the Natural History Museum, London from Milltown, Ashover, Derbyshire

Hematite tumblestone

Hematite group
A group of hematite

Star rubies and sapphires
Star stones of ruby and sapphire, both are varieties of the mineral corundum (aluminium oxide). Ruby always appears in red where as sapphire comes in a variety of colours

Ruby and Sapphire cut stones

Alexandrite
A twinned alexandrite crystal. Alexandrite is a variety of chrysoberyl (beryllium aluminum oxide) and is named after the former Czar of Russia, Alexander II

Ruby
A six-rayed star ruby. Ruby is the red variety of the mineral corundum (aluminium oxide)

Sapphire
A six-rayed star blue sapphire. Sapphires derives from the corundum mineral group which is the second hardest group known

Chromite (iron chromium oxide) is the ore of chromium and has an attractive shiny surface. It is used in the manufacture of stainless steel and in metallic paints

Sapphire crystal
Sapphire is a blue variety of corundum, which is the second hardest natural substance known on Earth. Specimen originates from Olberg, Rheinland, now at the Natural History Museum, London

Ruby is a variety of corundum, which is the second hardest natural substance known on Earth. Specimen is originally from Aust-Agder, Norway, and is now on display at the Natural History Museum, London

Brookite
A specimen of the mineral brookite (titanium oxide) from Tremadoc wales. Brookite is a polymorph, it has the same chemical composition as rutile and anatase

Orange sapphire
A rare Sri-Lankan hexagonal cut orange sapphire. Sapphires belong to the corundum group - the second hardest mineral group known

Rutile
A specimen of the mineral rutile (titanium oxide) which is a major ore of the metal titanium. This specimen is from Graves Mountain, Lincoln County, Georgia. USA

Hematite
Iridescent crystalline mass of hematite (iron oxide) from Rio Marina, Elba. Specimen from the collections of the Natural History Museum, London

Baryte crystals
Yellow prisms of the minreal baryte (BaSO4) on hematite (iron oxide) from Dalmellington Mine, Frizington, Cumbria

Citrine and sapphire
Fine and poor examples of gem cutting and polishing. A superbly cut citrine (a yellow variety of quartz) and a poorly cut sapphire (blue), a variety of the mineral Corundum (aluminium oxide)

Fluorescent group
A group including amber, ruby, ivory, fluorite and opal photographed in ultra violet light. See 179 for the same group in white light

Anaesthetic Apparatus
Frankis Evans Nasal Nitrous Oxide apparatus : (lower) Trewbys apparatus [This catalogue contains 2000 pages of medical equipment] Date: 1930

Statue of Hans Adolph Brorson (1694 - 1764), close-up of head, standing beside cathedral in historic town, Our Lady Maria Cathedral (Vor Frue Maria Domkirke), Ribe, Jutland, Denmark, may

Dismantled capacitor. This is a device designed to store and release electric charge. The charge is stored in a rolled up cylinder of material seen at centre (brown)

Nuclear fuel production, Russia
Nuclear fuel production at the Novosibirsk Chemical Concentrate Works, Russia. This is the starting stage, where material in the blue drums (from processed uranium ore)

Haematite mineral rock
Haematite, commonly called kidney ore, in its mamillated form. Haematite (iron oxide) varies in colour from metallic black to dull red

Iron oxide deposit (orange) in a rock. It is deposits like these that are mined to obtain iron ore, which is then processed to produce iron from the iron oxide

Grinding mill in cement plant
Cement production. View of a rotating grinding mill used for the production of cement. Marl is a calcium carbonate rich mudstone that also includes clays and aragonite

Marl pit for cement production
Cement production. View of a marl pit that provides the raw material for the production of cement. Marl is a calcium carbonate rich mudstone that also includes clays and aragonite

Petroglyph of Running Elephant, Libya
Petroglyph (rock engraving) of an elephant in the Tadrart-Acacus region of Libya. The oldest petroglyphs are dated to approximately the Neolithic and late Upper Paleolithic boundary, about 10

Elephant Petroglyph, Libya
Petroglyph (rock engraving) of elephants in the Tadrart-Acacus region of Libya. The oldest petroglyphs are dated to approximately the Neolithic and late Upper Paleolithic boundary, about 10

pH measurement of oxide solutions
pHs of oxide solutions. Aqueous solutions of the oxides of some elements with universal indicator (UI) added to show their pH (acidity). The element forming each oxide is labelled

Sodium burning in air. Sodium (Na) is a highly reactive metallic element from group one of the periodic table. It burns in air, reacting with atmospheric oxygen (O2) to form sodium oxide (Na2.O)

Magnesium ribbons
Magnesium. Strips of the reactive metallic element magnesium (Mg). The strip at left is tarnished and appears darker. This is due to the formation of magnesium oxide (MgO)

Humphry Davy / Experiments
Humphry Davy, whilst director of the laboratory of the Pneumatic Institution, Clifton, investigates the effects of nitrous oxide (laughing gas)

Paul Bert / Anaesthetics
Dr. Paul Berts method of using compressed nitrous oxide

Rocks, Zinc and Tin
Silicate of zinc, smithsonite, carbonate of zinc, sulphide of zinc and oxide of tin

Rocks, Iron Ore
Various types of iron ore and iron oxide

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"Exploring the World of Oxide: From Perovskite Crystal Structure to Ancient Mines" Delving into the depths of mineralogy, we uncover the fascinating world of oxides. Journeying to Wherry Mine in Cornwall, England, we discover Cassiterite - a captivating oxide with its unique crystal structure. Franklinite, a zinc ore found in Wherrytown's mines, showcases the diverse range of oxides and their industrial applications. The enigmatic beauty of Perovskite captivates our imagination as we explore its intricate crystal lattice structure. Unveiling the intriguing connection between oxides and religion, we encounter a Crucifix carved from an ancient rock rich in copper oxide minerals. Rewinding time through vintage advertisements, Dr Williams' pink pills for pale people remind us how oxides have been used historically for medicinal purposes. Gazing upon Cuprite with Minor Quartz from Gwennap's mines in Cornwall takes us on a visual journey through nature's artistic expression using vibrant red oxide hues. Hematite from Buxton reveals nature's mastery at creating stunning formations that showcase iron oxide's mesmerizing colors and patterns. In Forest of Dean, Goethite with Calcite reminds us that even humble rust can transform into breathtaking works of art when combined with other minerals like calcite crystals. Manganite from Warwickshire tells tales of geological wonders hidden beneath our feet - showcasing manganese dioxide's ability to form striking black crystalline structures. Wheal Maudlin in Lostwithiel holds secrets within its ancient grounds; Cassiterite emerges as a testament to Cornwall’s rich mining history and its significant role in tin production. In this captivating exploration into the realm of oxides, we witness their remarkable diversity and undeniable allure across various locations worldwide – reminding us that these compounds are not just scientific curiosities, but also integral parts of our geological heritage.