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  2. Lustreware - Wikipedia

    en.wikipedia.org/wiki/Lustreware

    Staining glass vessels with copper and silver pigments was known from around the 3rd century AD, [15] although lustreware technology probably began sometime between the 8th and 9th centuries AD. [16] [17] The earliest recipe for luster production appeared in 8th century AD "Kitab al-Durra al-Maknuzna" by Jabir ibn Hayyan. [18]

  3. Lustre (mineralogy) - Wikipedia

    en.wikipedia.org/wiki/Lustre_(mineralogy)

    Lustre (British English) or luster (American English; see spelling differences) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the Latin lux , meaning "light", and generally implies radiance, gloss, or brilliance.

  4. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  5. Copper - Wikipedia

    en.wikipedia.org/wiki/Copper

    Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents, fungicides, and wood preservatives. Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c ...

  6. Copper nanoparticle - Wikipedia

    en.wikipedia.org/wiki/Copper_nanoparticle

    A copper nanoparticle is a copper based particle 1 to 100 ... The luster effect is caused by interference effects of light reflecting off two layers of copper ...

  7. Native copper - Wikipedia

    en.wikipedia.org/wiki/Native_copper

    Native copper is an uncombined form of copper that occurs as a natural mineral. Copper is one of the few metallic elements to occur in native form, although it most commonly occurs in oxidized states and mixed with other elements. Native copper was an important ore of copper in historic times and was used by pre-historic peoples.

  8. Chalcocite - Wikipedia

    en.wikipedia.org/wiki/Chalcocite

    Chalcocite (/ ˈ k æ l k ə ˌ s aɪ t /), [6] [7] copper(I) sulfide (Cu 2 S), is an important copper ore mineral. It is opaque and dark gray to black, with a metallic luster. It has a hardness of 2.5–3 on the Mohs scale. It is a sulfide with a monoclinic crystal system. The term chalcocite from the Greek khalkos, meaning "copper".

  9. Cuprite - Wikipedia

    en.wikipedia.org/wiki/Cuprite

    Cuprite is an oxide mineral composed of copper(I) oxide Cu 2 O, and is a minor ore of copper. [5]Cuprite from Tsumeb Mine (size:2.3 x 2.1 x 1.2 cm. Its dark crystals with red internal reflections are in the isometric system hexoctahedral class, appearing as cubic, octahedral, or dodecahedral forms, or in combinations.