enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Tumble finishing - Wikipedia

   en.wikipedia.org/wiki/Tumble_finishing

   Tumble finishing, also known as tumbling or rumbling, [1] is a technique for smoothing and polishing a rough surface on relatively small parts. In the field of metalworking, a similar process called barreling, or barrel finishing, [2] works upon the same principles. Tumbled stones are made with rock tumblers in a process very similar to the ...

3. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...

4. Gravel - Wikipedia

   en.wikipedia.org/wiki/Gravel

   Gravel (/ ˈɡrævəl /) is a loose aggregation of rock fragments. Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone. Gravel is classified by particle size range and includes size classes from granule - to boulder -sized fragments.

5. Rose quartz, raw minerals and amethyst geodes, oh my ... - AOL

   www.aol.com/news/rose-quartz-raw-minerals...

   Blakemore said she first discovered her interest in semiprecious stones and minerals as a child playing with a rock tumbler. Even though she doesn’t collect as much as she used to, Blakemore ...

6. Emery (rock) - Wikipedia

   en.wikipedia.org/wiki/Emery_(rock)

   Wet slab, 10 cm (3.9 in) wide. Emery, or corundite, is a dark granular rock used to make an abrasive powder. The rock largely consists of corundum (aluminium oxide), mixed with other minerals. Industrial emery may contain a variety of other minerals and synthetic compounds. Crushed or naturally eroded emery (known as black sand) is used as an ...

7. List of rock types - Wikipedia

   en.wikipedia.org/wiki/List_of_rock_types

   Claystone – Clastic sedimentary rock composed primarily of clay-sized particles. Coal – Combustible sedimentary rock composed primarily of carbon. Conglomerate – Sedimentary rock composed of smaller rock fragments. Coquina – Sedimentary rock that is composed mostly of fragments of shells.