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2. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   Diamond cutting is the art and science of creating a gem-quality diamond out of mined rough. The cut of a diamond describes the manner in which a diamond has been shaped and polished from its beginning form as a rough stone to its final gem proportions. The cut of a diamond describes the quality of workmanship and the angles to which a diamond ...

3. Machine taper - Wikipedia

   en.wikipedia.org/wiki/Machine_taper

   Tools with an R8 taper are inserted directly into the machine's spindle. R8 collets are typically used to hold tooling with round shanks, although any shape can be held if the collet has the corresponding shape cut in it. The collets have a precision bore with axial compression slots for holding cutting tools and are threaded for the drawbar.

4. New York (state) - Wikipedia

   en.wikipedia.org/wiki/New_York_(state)

   New York exports a wide variety of goods such as prepared foods, computers and electronics, cut diamonds, and other commodities. In 2007, the state exported a total of $71.1 billion worth of goods, with the five largest foreign export markets being Canada ($15 billion), the United Kingdom ($6 billion), Switzerland ($5.9 billion), Israel ($4.9 ...