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Opal vs Nacre - What's the difference?

opal | nacre |

As nouns the difference between opal and nacre

is that opal is (mineralogy) a mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula si]]o2· n[[water|h2o while nacre is (obsolete) a shellfish which contains mother-of-pearl.

opal

English

(wikipedia opal)

Noun

(en noun)
  • (mineralogy) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula Si]]O2· n[[water, H2O.
  • * {{quote-magazine, date=2012-03
  • , author=Lee A. Groat , title=Gemstones , volume=100, issue=2, page=128 , magazine=(American Scientist) citation , passage=Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals , peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)}}
  • (biology, genetics, biochemistry) A colloquial name used in molecular biology referring to a particular stop codon sequence, "UGA."
  • Derived terms

    * fire opal * wood opal * opaline * opalesce

    References

    Anagrams

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    nacre

    English

    Alternative forms

    * (l) (obsolete) * (l) (obsolete)

    Noun

    (en noun)
  • (obsolete) A shellfish which contains mother-of-pearl.
  • *, II.12:
  • The shell-fish called a Nacre , liveth even so with the Pinnotere, which is a little creature like unto a Crabfish.
  • A pearly substance which lines the interior of many shells; mother-of-pearl.
  • *
  • Derived terms

    * (l)

    Anagrams

    * ----