Agate \A*gate"\, adv. [Pref. a- on + gate way.]

On the way; agoing; as, to be agate; to set the bells agate. [Obs.]

--Cotgrave.

Source: Webster's Revised Unabridged Dictionary (1913)
 

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.

Note: The fortification agate, or Scotch pebble, the moss agate, the clouded agate, etc., are familiar varieties.

2. (Print.) A kind of type, larger than pearl and smaller than nonpareil; in England called ruby.

Note: This line is printed in the type called agate.

3. A diminutive person; so called in allusion to the small figures cut in agate for rings and seals. [Obs.]

--Shak.

4. A tool used by gold-wire drawers, bookbinders, etc.; -- so called from the agate fixed in it for burnishing.

Source: Webster's Revised Unabridged Dictionary (1913)
 

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.]

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.

Source: Webster's Revised Unabridged Dictionary (1913)