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Quartz · Minerals · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/exhibits/show/minerals/quartz.html9 Apr 2024: Quartz single crystal, no cleavage, conchoidal fracture. Quartz prisms, vitreous lustre. Quartz prisms (roughly hexagonal habit). Quartz crystal structure (trigonal unit cell), CrystalMaker. Formula. SiO. 2. Structure. Framework silicate. Crystal -
Serpentine · Minerals · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/exhibits/show/minerals/serpentine.html9 Apr 2024: Serpentine crystal lattice, with sheet silicate structure (CrystalMaker). Serpentine is a common alteration product of olivine, produced by hydration at low temperatures. Formula. Mg. 3. [Si. 2. O. 5. ](OH). 4. Structure. Sheet silicate. Crystal -
Sphene · Minerals · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/exhibits/show/minerals/sphene.html9 Apr 2024: Sphene crystal structure, CrystalMaker. Formula. CaTi[SiO. 4. ](O, OH, F). Structure. Orthosilicate. Crystal System. Crystal system: monoclinic (). Physical Properties. Colour in hand specimen: colourless, yellow, green, brown or black. Cleavage: one -
Tourmaline · Minerals · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/exhibits/show/minerals/tourmaline.html9 Apr 2024: Tourmaline crystal structure (trigonal), CrystalMaker. Tourmaline is the only common mineral of which boron is an essential constituent. Its presence in a rock, therefore, indicates that the rock contains significant boron. Formula. -
Zircon · Minerals · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/exhibits/show/minerals/zircon.html9 Apr 2024: Zircon crystal structure (tetragonal), CrystalMaker. Zircon is a common accessory mineral of many igneous rocks. Pleochroic haloes are formed by damage to the crystal lattice of enclosing minerals by the radioactive decay of elements such as Th and -
Browse Items · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/items%3Fpage=21&sort_field=Dublin+Core,Title.html9 Apr 2024: Browse Items (264 total). Page. of 27. Sort by:. Compare with phenocryst. Formula Fe3O4 Structure Non-silicate Crystal System Crystal system: cubic Physical Properties Colour in hand specimen: blackStreak: blackCleavage: noneHardness: 7.5-8 Optical -
Browse Items · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/items%3Fpage=21.html9 Apr 2024: Browse Items (264 total). Page. of 27. Sort by:. Formula NaCl Structure Non-silicate Crystal System Crystal system: cubic Physical Properties Colour in hand specimen: colourless or white when pure, more typically orange or red due to inclusions of -
Browse Items · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/items%3Fpage=6&sort_field=Dublin+Core,Creator.html9 Apr 2024: Browse Items (264 total). Page. of 27. Sort by:. Formula (K,Na)[AlSi3O8] Structure Framework silicate Crystal System Crystal system: monoclinic (-) or triclinic () (-) Physical Properties Colour in hand specimen: white or pink Cleavage: two at 90 -
Browse Items · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/items%3Fpage=7&sort_field=Dublin+Core,Title&sort_dir=d.html9 Apr 2024: Browse Items (264 total). Page. of 27. Sort by:. Formula Fe3O4 Structure Non-silicate Crystal System Crystal system: cubic Physical Properties Colour in hand specimen: blackStreak: blackCleavage: noneHardness: 7.5-8 Optical Properties Colour in -
Browse Items · 1A Collections
https://p1acollections.esc.cam.ac.uk/p1acollections/items/browse%3Ftags=igneous&sort_field=Dublin+Core,Creator.html9 Apr 2024: Browse Items (7 total). Tags: igneous. Sort by:. Formula (Na,K)0-1Ca2(Mg,Fe2+,Fe3+,Al)5Si6-7.5Al2-0.5O22(OH)2 Structure Chain silicate Crystal System Crystal system: monoclinic () (-) Physical Properties Colour in hand specimen: black Cleavage:
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