DictionaryagateBanded gemstone
noun

agate

AG-uht/ˈæɡət/

A banded variety of chalcedony used as a decorative gemstone.

The polished agate reveals concentric bands of different colors.

A cut and polished agate nodule with clearly visible concentric, wavy mineral bands, beside a small polished agate cabochon that shows its gemstone use.
Etymology

Greek akhatēs also named a Sicilian river where agates were found. The stone may have taken its name from the river, as Pliny reported, but the river could instead have been named for the stone.

In context

Storytime Haven124:41
suggested an agate cameo carved by a master’s hand.
The lavender dragon by Eden Phillpotts | Fantasy Full Audiobook

More examples

  • A slice of agate stood on the windowsill.
  • The collector arranged several agates in a display case.
  • Fine layers run through the agate like ripples in water.

Forms

agate · agates

Similar words

chalcedony
Names the broader mineral variety that includes agate.
jasper
Usually lacks agate's translucent, distinctively banded appearance.