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2. Tumble finishing - Wikipedia

   en.wikipedia.org/wiki/Tumble_finishing

   Bridal crown made from pure tin and tumble polished rock crystals in 1984. In the polishing step, rock polish is added in place of grit as well as the plastic tumbling pellets. After further tumbling, the rocks should now have a shiny look when dry. If this is not the case and the rocks appear to have a film on them, a burnishing step may be ...

3. Stone spheres of Costa Rica - Wikipedia

   en.wikipedia.org/wiki/Stone_spheres_of_Costa_Rica

   However, most of the spheres were created from gabbro, an acid-resistant igneous rock. [21] In the cosmogony of the Bribri, which is shared by the Cabecares and other American ancestral groups, the stone spheres are "Tara's cannon balls". Tara or Tlatchque, the god of thunder, used a giant blowpipe to shoot the balls at the Serkes, gods of ...

4. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   As quartz is a form of silica, it is a possible cause for concern in various workplaces. Cutting, grinding, chipping, sanding, drilling, and polishing natural and manufactured stone products can release hazardous levels of very small, crystalline silica dust particles into the air that workers breathe. [70]

5. Lapidary - Wikipedia

   en.wikipedia.org/wiki/Lapidary

   Most modern lapidary work is done using motorized equipment. Polishing is done with resin- or metal-bonded emery, silicon carbide (carborundum), aluminium oxide , or diamond dust in successively decreasing particle sizes until a polish is achieved. In older systems, the grinding and polishing powders were applied separately to the grinding or ...

6. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Grinding wheels and polishing agents are used to grind, shape, and polish the smooth dome shape of the stones. [ 35 ] Gems that are transparent are normally faceted, a method that shows the optical properties of the stone's interior to its best advantage by maximizing reflected light which is perceived by the viewer as sparkle.

7. Old fashioned glass - Wikipedia

   en.wikipedia.org/wiki/Old_fashioned_glass

   The old fashioned glass, otherwise known as the rocks glass, whiskey glass, and lowball glass [1] [2] (or simply lowball), is a short tumbler used for serving spirits, such as whisky, neat or with ice cubes ("on the rocks"). It is also normally used to serve certain cocktails, such as the old fashioned.