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2. Tumble finishing - Wikipedia

   en.wikipedia.org/wiki/Tumble_finishing

   A collection of gemstone pebbles. Most of these stones, except four rough ones, were tumbled and polished. Tumbling of rocks as a lapidary technique for rock polishing usually requires a plastic or rubber-lined barrel loaded with a consignment of rocks, all of similar or the same hardness, some abrasive grit, and a liquid lubricant.

3. Gravel - Wikipedia

   en.wikipedia.org/wiki/Gravel

   Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) 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.

4. Emery (rock) - Wikipedia

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

   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 abrasive. Turkey and Greece are ...

5. Pegmatite - Wikipedia

   en.wikipedia.org/wiki/Pegmatite

   A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm (0.4 in) and sometimes greater than 1 meter (3 ft). Most pegmatites are composed of quartz , feldspar , and mica , having a similar silicic composition to granite .

6. Conglomerate (geology) - Wikipedia

   en.wikipedia.org/wiki/Conglomerate_(geology)

   Conglomerate (/ k ən ˈ ɡ l ɒ m ər ɪ t /) is a sedimentary rock made up of rounded gravel-sized pieces of rock surrounded by finer-grained sediments (such as sand, silt, or clay). The larger fragments within conglomerate are called clasts, while the finer sediment surrounding the clasts is called the matrix.

7. 100 “One Size Fits All” Presents That Will Please Everyone

   www.aol.com/only-gift-guide-100-christmas...

   I've been on weight-watchers for 3 months And there are limited amount of desserts that you can eat in bulk to satisfy the sugar cravings. ... It might be a bit too rough for our daughter, but ...