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Sardonyx vs Agate - What's the difference?

sardonyx | agate |

As a noun sardonyx

is a gemstone having bands of red sard; a variety of onyx or chalcedony.

As a proper noun agate is

.

sardonyx

English

(wikipedia sardonyx)

Noun

(sardonyxes)
  • A gemstone having bands of red sard; a variety of onyx or chalcedony.
  • * Bible, Revelations xxi. 20
    • The fifth, sardonyx ; the sixth, sardius; the seventh, chrysolyte; the eighth, beryl; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst.
  • *
    • ----

    agate

    English

    Etymology 1

    From (etyl) agathe, from (etyl) .

    Noun

  • (countable, uncountable, mineral) A semi-pellucid, uncrystallized variety of quartz, presenting various tints in the same specimen, with colors delicately arranged in stripes or bands, or blended in clouds.
  • (uncountable, US, printing) 5.5-point size of type, larger than pearl and smaller than nonpareil; in England called ruby.
  • (countable, obsolete) A diminutive person; so called in allusion to the small figures cut in agate for rings and seals.
  • (countable) A tool used by gold-wire drawers, bookbinders, etc.;—so called from the agate fixed in it for burnishing.
  • (slang, usually in plural) A testicle.
    • Synonyms
    * (printing) ruby (Britain)
    Hyponyms
    * (mineralogy) fortification agate, Scotch pebble; moss agate, clouded agate
    Derived terms
    * moss agate * agate line * agateware
    Related terms
    * aggie

    Etymology 2

    Adverb

    (-)
  • (obsolete) On the way; agoing.
    • to be agate'''; to set the bells '''agate
    (Cotgrave)
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