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The Collaborative International Dictionary of English v.0.48 (gcide)

Agate \A*gate"\, adv. [Pref. a- on gate way.]
On the way; agoing; as, to be agate; to set the bells agate.
[Obs.] --Cotgrave.
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Agate \Ag"ate\, n. [F. agate, It. agata, L. achates, fr. Gr. ?.]
1. (Min.) A semipellucid, uncrystallized variety of quartz,
presenting various tints in the same specimen. Its colors
are delicately arranged in stripes or bands, or blended in
clouds.
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Note: The fortification agate, or Scotch pebble, the moss
agate, the clouded agate, etc., are familiar varieties.
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2. (Print.) A kind of type, larger than pearl and smaller
than nonpareil; in England called ruby.
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3. A diminutive person; so called in allusion to the small
figures cut in agate for rings and seals. [Obs.] --Shak.
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4. A tool used by gold-wire drawers, bookbinders, etc.; -- so
called from the agate fixed in it for burnishing.
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Chalcedony \Chal*ced"o*ny\ (k[a^]l*s[e^]d"[-o]*n[y^] or
k[a^]l"s[-e]*d[-o]*n[y^]; 277), n.; pl. {Chalcedonies}
(-n[i^]z). [ L. chalcedonius, fr. Gr. CHalkhdw`n Chalcedon, a
town in Asia Minor, opposite to Byzantium: cf. calc['e]doine,
OE. calcidoine, casidoyne. Cf. {Cassidony}.] (Min.)
A cryptocrystalline, translucent variety of quartz, having
usually a whitish color, and a luster nearly like wax.
[Written also {calcedony}.]
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Note: When chalcedony is variegated with with spots or
figures, or arranged in differently colored layers, it
is called {agate}; and if by reason of the thickness,
color, and arrangement of the layers it is suitable for
being carved into cameos, it is called {onyx}.
{Chrysoprase} is green chalcedony; {carnelian}, a flesh
red, and {sard}, a brownish red variety.
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