In the gemstone world, a "cabochon" is a stone that has been cut (or shaped) with a highly-polished rounded, domed or convex top, with no faceting of any kind. The bottoms of cabochons are described as "flat", but many will have slightly curved or undulated bases. Cbochons are often left with slightly rough or unfinished bottoms, which makes it easier for jewelers to mount them into jewelry settings. Cabochons may be cut into any shape, although oval is by far the most common.
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