gemstone

[jem-stohn]
noun
a precious or semiprecious stone that can be cut and polished for use as a gem.

Origin:
before 1000; Middle English gimstone, Old English gimstān. See gem, stone

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World English Dictionary
gemstone (ˈdʒɛmˌstəʊn)
 
n
a precious or semiprecious stone, esp one cut and polished for setting in jewelleryRelated: lapidary
 
Related: lapidary

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Amber is a semiprecious gemstone formed from fossilized tree sap.
Ruby, the common name for the mineral corundum in its red form, is a precious
  gemstone.
Your home state may have an official rock, mineral, or gemstone.
Next the bezel is cut and a pyramid-faceted gemstone is set, point side up.
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