Agate

noun

1. 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.
2. The size of type between pearl and nonpareil, standardized as 5 1/2-point.
3. One fourteenth of an inch
4. A diminutive person; so called in allusion to the small figures cut in agate for rings and seals.
5. A tool used by gold-wire drawers, bookbinders, etc.;—so called from the agate fixed in it for burnishing.