- 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 polished...
-
academically trained gemologists and are
qualified to
identify and
evaluate gems.
Rudimentary education in
gemology for
jewellers and
gemologists began in...
-
original on 19 July 2015.
Retrieved 2
January 2016. "Peberholm – an
artificial gem of nature" "Nya
arter hittar till Pepparholm" (in Swedish). 14 June...
-
jewelry gems and is very durable.
Other varieties of
gem-quality
corundum are
called sapphires. Ruby is one of the
traditional cardinal gems, alongside...
-
florentined white gold
triangle with a
stone of
brilliant white fabulite — an
artificial gem "developed by the
laser industry and used in
space mechanisms for its...
- Vol. 1. Princeton, New Jersey: Van Nostrand. p. 316. "The
Manufacture of
Gem Stones".
Scientific American. New York: Munn & Company: 49. 25 July 1874...
- An
engraved gem,
frequently referred to as an intaglio, is a
small and
usually semi-precious
gemstone that has been carved, in the
Western tradition normally...
-
Shelby Gem Factory was the
production facility of ICT Incorporated, a
company in Shelby, Michigan,
United States, that
manufactured artificial gemstones...
-
birthstone for
September and the
gem of the 45th anniversary. A
sapphire jubilee occurs after 65 years.
Sapphire is one of the two
gem-varieties of corundum, the...
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prized as a
gemstone for
millennia due to its hue. Like most
other opaque gems,
turquoise has been
devalued by the
introduction of treatments, imitations...