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2. 12 Kids' Picnic Tables For Crafts, Reading, Puzzles and More

   www.aol.com/lifestyle/12-kids-picnic-tables...

   Upgrade outdoor play with these durable kids' picnic tables, from small ones with umbrellas designed for toddlers to options with benches for big kids and more. 12 Kids' Picnic Tables For Crafts ...

3. 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.

4. 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.

5. 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 ...

6. 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 ...

7. 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 ...

8. Smoky quartz - Wikipedia

   en.wikipedia.org/wiki/Smoky_quartz

   Smoky quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystals. [6] The color of smoky quartz is produced when natural radiation, emitted from the surrounding rock, activates color centers around aluminum impurities within the ...

9. Quartz clock - Wikipedia

   en.wikipedia.org/wiki/Quartz_clock

   As of 2019, an autonomous light-powered high-accuracy quartz watch movement became commercially available which is claimed to be accurate to ± 1 second per year. [ 19 ] [ 20 ] Key elements to obtain the high claimed accuracy are applying an unusually shaped (for a watch) ( AT-cut ) quartz crystal operated at 2 23 or 8 388 608 Hz frequency ...