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2. Hayrake table - Wikipedia

   en.wikipedia.org/wiki/Hayrake_table

   Hayrake table in oak by Gordon Russell [1] Hayrake table in oak by Peter Waals [2] A hayrake table is a distinct pattern of table produced as part of the English Arts and Crafts movement in the early part of the twentieth century. [3] Its distinctive feature is the arrangement of the lower stretcher between the legs as a double-ended Y-shape.

3. Hydrargyrum quartz iodide - Wikipedia

   en.wikipedia.org/wiki/Hydrargyrum_quartz_iodide

   Hydrargyrum quartz iodide (HQI) is a trademark name of Osram's brand of metal halide lamps [1] made for general floodlighting, arena floodlighting, shop and commercial and industrial lighting. Hydrargyrum is the Latin name for the element mercury. When heated, mercury vapour is created inside the lamp, and deposited when it cools.

4. Light table - Wikipedia

   en.wikipedia.org/wiki/Light_table

   Light table at Tito's bunker Draftsman using light table. A light table [1] is a viewing device that is used to review photographic film or artwork placed on top of it. A horizontal form of a self-standing lightbox, it provides even illumination of the subject from below through a translucent cover and fluorescent lights that emit little heat.

5. Engineered stone - Wikipedia

   en.wikipedia.org/wiki/Engineered_stone

   The private Spanish company Cosentino brand Silestone and the public Israeli company Caesarstone are the most recognizable brands for quartz, as well as Totem Quartz, an Iranian company which has a huge market in the middle east and Central Asia. Gulfstone, an Oman-based company, is the only producer of engineered quartz stone in the GCC.

6. Fused quartz - Wikipedia

   en.wikipedia.org/wiki/Fused_quartz

   Phosphorescence in fused quartz from an extremely intense pulse of UV light in a flashtube, centered at 170 nm. Fused quartz is prone to phosphorescence and "solarisation" (purplish discoloration) under intense UV illumination, as is often seen in flashtubes. "UV grade" synthetic fused silica (sold under various tradenames including "HPFS ...

7. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

8. Luminous gemstones - Wikipedia

   en.wikipedia.org/wiki/Luminous_gemstones

   Kuai Shen [噲參] was the most filial son to his mother. Once a black crane was injured by a bow hunter and in its extremity, went to Kuai. The latter took it in, doctored its wound, and when it was cured set it free. Soon afterwards the crane showed up again outside Kuai's door. The latter shone a torch to see out and discovered its mate ...

9. Prasiolite - Wikipedia

   en.wikipedia.org/wiki/Prasiolite

   Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [citation needed] but it has also been mined in the Lower Silesia region of Poland. Naturally occurring prasiolite has also been found in the Thunder Bay area of ...