enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Luminous gemstones - Wikipedia

   en.wikipedia.org/wiki/Luminous_gemstones

   In 1735, the French chemist Charles François de Cisternay du Fay determined that lapis lazuli, emerald, and aquamarine were luminescent. Josiah Wedgwood, in 1792, found phosphoresce from rubbing together two pieces of quartz or of agate, and wrote that the ruby gives "a beautiful red light of short continuance."

3. Lapis lazuli - Wikipedia

   en.wikipedia.org/wiki/Lapis_Lazuli

   Lapis lazuli (UK: / ˌ l æ p ɪ s ˈ l æ z (j) ʊ l i, ˈ l æ ʒ ʊ-,-ˌ l i /; US: / ˈ l æ z (j) ə l i, ˈ l æ ʒ ə-,-ˌ l i /), or lapis for short, is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color.

4. Shades of blue - Wikipedia

   en.wikipedia.org/wiki/Shades_of_blue

   Lapis lazuli, the source of the ultramarine pigment ... Fluorescent blue is a shade of blue that is radiant based on fluorescence. This is the main color on the ...

5. List of inorganic pigments - Wikipedia

   en.wikipedia.org/wiki/List_of_inorganic_pigments

   Persian blue: made by grinding up the mineral Lapis lazuli. The most important mineral component of lapis lazuli is lazurite (25% to 40%), a feldspathoid silicate mineral with the formula (Na,Ca) 8 (AlSiO 4) 6 (S,SO 4,Cl) 1–2. Cobalt pigments. Cobalt blue (PB28): cobalt(II) aluminate. Cerulean blue (PB35): cobalt(II) stannate. Cerium uranium ...

6. Azure spar - Wikipedia

   en.wikipedia.org/wiki/Azure_spar

   Lazurite or lapis lazuli is an opaque mineral, sodium aluminosilicate sulfate with the ideal formula Na[(AlSiO 4)SO 4], having a color from blue to bluish- or greenish-gray, was previously widely known as azure spar.

7. Azurite - Wikipedia

   en.wikipedia.org/wiki/Azurite

   Lapis lazuli (the pigment ultramarine) was chiefly supplied from Afghanistan during the Middle Ages, whereas azurite was a common mineral in Europe at the time. Sizable deposits were found near Lyons, France. It was mined since the 12th century in Saxony, in the silver mines located there. [17]

8. Azure (color) - Wikipedia

   en.wikipedia.org/wiki/Azure_(color)

   The color azure ultimately takes its name from the vivid-blue gemstone lapis lazuli, a metamorphic rock. Lapis is the Latin word for "stone" and lāzulī is the genitive form of the Medieval Latin lāzulum, which is taken from the Arabic لازورد lāzaward [laːzwrd] (listen ⓘ), itself from the Persian لاژورد lāžaward, which is ...

9. Blue pigments - Wikipedia

   en.wikipedia.org/wiki/Blue_pigments

   It was produced from lapis lazuli, a mineral whose major source was the mines of Sar-e-Sang in what is now northeastern Afghanistan. [7] It is now produced industrially by heating aluminosilicates with sulfur. It is widely used in coloring plastics. paints, laundry applications, cosmetics, and toys. [8]